Motion: The Essence of Music

A journey tracing a familiar word from the Chassidic lexicon—one that reveals the very essence of music: motion. A key to understanding music itself—and the secret of the vitality that resounds through Chassidic nigunim from generation to generation.

A Musical Term I Never Heard at the Conservatory

The word tenuah—“motion”—is so natural to the language of Chassidic music that we rarely stop to consider it. We speak of the tenuos of a nigun; nigunim are described as having one tenuah or several, rather like musical phrases; and there is even a nigun called Shalosh Tenuos—“Three Movements.”¹

Yet it is precisely this familiar usage that raises a question: Why is a section of music called a tenuah, a “movement”? What, exactly, is moving?

A study of Chassidic discourses reveals that this word touches on the very definition of a nigun:

“For a nigun is motion, and every motion gives rise to warmth and emotional stirring.”²

This brief equation—“a nigun is motion”—seems intended to capture something essential about the nature of music itself.

The same conception appears in other sources. In Torah Or, the Alter Rebbe, Rabbi Schneur Zalman of Liadi, explains that the essence of a nigun lies in the soul’s emotional response “through the revelation of the movements,” to the point that “the revelation of the movement awakens the revelation of the heart.”³ The Rebbe Rayatz, Rabbi Yosef Yitzchak Schneersohn, develops the idea further: “In music there are movements, and each movement gives rise to warmth, for warmth is a vessel for vitality.”⁴

What Does a Symphony Have to Do with Motion?

Then I remembered: classical music, too, speaks of “movements.”

In English, a self-contained section of a sonata, symphony, or concerto is called a movement; French and Italian use the corresponding words mouvement and movimento. Here, too, a word meaning movement has become a familiar musical term, one we use almost without thinking about its original sense.⁵

The parallel between Chassidic usage and classical terminology only sharpens the question: What is it about music that leads such different traditions to describe it in the language of motion?

A Scholar of Musical Motion

Ernst Kurth devoted an extensive investigation to the question of motion in music. One of the leading musicologists and theorists of the first half of the twentieth century, Kurth explored the psychological foundations of musical perception. At the center of his thought is an energetic conception of music, which explains melody and harmony in terms of motion, forces, and tensions.

His major work, Foundations of Linear Counterpoint (Grundlagen des linearen Kontrapunkts), begins its chapter “Melodic Energy” with three words: “Melody is motion.” For Kurth, this is no figure of speech. The book’s first part investigates musical motion: the forces that propel it, the tensions that arise within it, and the ways in which these become manifest in the tones we hear.⁶

Music Begins Before the Sound

We are accustomed to thinking of the individual tone as the basic building block of music. Just as a word is made up of letters, so, it would seem, a melody is made up of tones: first comes a single tone, then others are added until music emerges.

Kurth reverses this way of looking at things: “The beginning of music is not the tone.” Tones are the audible surface of music—what reaches our ears and is recorded in notation. But behind them an inner motion is at work: momentum, attraction, tension, and release. It takes on an audible form in the tones and shapes them into a progression with direction and life.⁷

When we hear a melody, we experience it rising, lingering, gathering tension, or coming to rest. At any given moment a particular tone sounds, yet within it we sense the motion of the whole musical progression: where it has come from, where it is tending, and what still seeks resolution. Kurth regards this motion as music’s formative force, and the tones as its outward expression.

We sense this especially in the transition from one tone to another. The next tone is experienced as a continuation of what preceded it: it may carry the previous tone’s momentum forward, intensify its tension, or bring it to rest. We feel that something is advancing, reaching, and changing.

“Transition is motion,” Kurth writes. The tones mark distinct pitches, but musical hearing experiences a continuous progression that passes between and through them. It is this continuity that enables us to hear them as one melody.⁸

The Eye Sees Notes; the Ear Hears Motion

Musical notation can mislead us at precisely this point. The eye sees one note, then another, then a third. Each occupies a definite position on the staff and has its own pitch and duration. It is easy, therefore, to imagine melody as the sum of these points. But the ear does not hear in this way. When we listen to a musical phrase, we experience a progression: ascent and descent, momentum, departure and approach, mounting tension and release. Individual tones derive their meaning from the line to which they belong.

Kurth stresses that what matters is not the tones as separate units but the connection between them. It is the sense of a force passing through them that transforms a chain of tones into a melody. Instead of imagining a “sequence” of points, he invites us to think of impulse, attraction, and flow—of a living line.⁹

Musical hearing, in this view, is more than an ability to recognize a pitch, interval, or chord. It is the ability to sense what the line is doing: where it is heading, where it gains strength, where it hesitates, and where it releases its tension.

The Notes Change; the Melody Remains

The distinction between a collection of tones and musical motion becomes sharper when we examine what happens to a motif as it is developed. A motif is a short, distinctive musical idea that serves as the basis for developing a composition. A composer may widen or narrow its intervals, lengthen or shorten its rhythmic values, or even reverse the direction of its motion—from ascent to descent—and yet we may still recognize the original idea. What preserves a motif’s identity amid all these changes?

Kurth defines the motif as a “phase of motion”: a unit of melodic motion with a distinctive shape and character, apprehended by the ear as a single whole. Its identity lies in the movement of the line and the interplay of tensions within it. Even when the intervals and rhythm change, a clear relationship to the original pattern of motion may remain. The ear grasps the progression as a whole and recognizes its transformations.¹⁰

For Kurth, this is evidence that melody cannot be reduced to a list of tones and intervals. If these alone determined the identity of a motif, changing them would erase that identity. Our ability to recognize the motif through its transformations reveals the fundamental place of motion in musical experience.

Here the word Motiv itself acquires an additional significance. Kurth connects it with the Latin verb movere—to move, to set in motion, to stir. In compositional theory, a motif is understood as the germ that sets a work’s development in motion. Kurth directs our attention also to the origin of that germ: the motif is itself born of motion and gives motion a musical form.¹¹

The Invisible Thread Between the Notes

Kurth’s language suggests a tangible image. He speaks of a “chain” of tones through which an inner force flows, binding them into a unity.¹² Imagine precious stones laid out before you: each has its own color, brilliance, and shape. Thread them onto a string, and you have a necklace. The eye is drawn to the stones, but the invisible thread running through them is what holds them together and makes them a single piece of jewelry.

We find this very image in the Alter Rebbe’s explanation of the verse “Your neck with strings of jewels.” The letters of prayer are likened to precious stones, pierced so that “the thread that joins them” can pass through them. In the spiritual meaning of the analogy, inward intention and self-nullification (kavanah and bittul) bind the letters together and make them vessels for drawing down Divine light. As the worshipper moves from letter to letter and word to word, one inward intention runs through them all, animating the prayer and connecting it with the Infinite.¹³

The image illuminates what happens in music as well. Each tone is like a stone, with its own color and weight; motion is the inner thread passing between and through the tones. By its power, one tone is drawn toward the next, receives momentum from what came before, and leads toward what is yet to come. What we hear at this instant carries both memory and expectation. Thus the tones join into a melody endowed with direction, continuity, and life.

We can examine the stones as separate objects and miss the necklace they form. The same is true of music: recognizing the tones by themselves does not yet reveal the progression that joins them. For that, we must hear the invisible thread—the motion that continues from tone to tone and gives each its place within the whole.

Just as we can read letters and miss what they say, we can read notes and miss the music.

When Musical Notation Drew Motion

Kurth finds an intriguing witness to this principle in the history of musical notation. In early notational signs, the neumes, a symbol did not always specify the exact pitch of an individual tone. Rather, it traced a gesture—the rise, fall, and direction of a melodic line. Kurth sees an essential advantage in this: early notation directed attention toward the line and its motion, even if it was less precise about pitch. As more exact notation developed and tones came to be placed on staff lines, music gained the ability to record pitches and intervals with great precision. But a new danger also arose: that the eye would see chiefly separate units and forget that notes are points within a process.¹⁴

“Movements” in the Zohar

Within Jewish tradition we know an ancient system of notation with a similar quality: the ta’amei hamikra, the cantillation marks used in the reading of Scripture. These marks do not denote isolated pitches; they represent a melodic gesture and contour, a character and a motion. With G-d’s help, the musical dimensions of the cantillation marks will be the subject of a separate study. For our purposes, however, one striking detail emerges:

The Zohar itself calls the melodies of the cantillation marks “movements”—tenuos ha-te’amim.¹⁵

It would seem, then, that the Chassidic expression tenuos ha-nigun—“the movements of a nigun”—rests upon an ancient source in the mystical tradition of the Torah. Chassidus deepens this language and places motion at the heart of the definition of a nigun.

The Physics of Music

So far we have seen that music is not merely a succession of tones but motion. Yet what sets this motion in motion? What causes us to feel attraction between tones, tension, and release? Here Kurth deepens his definition: “Melody is flowing force.”¹⁶

To describe this force, Kurth explicitly turns to the language of physics. He uses the term “kinetic energy”—the energy of motion—and shifts our attention from the movement of bodies in space to the sensation of movement in musical experience. Just as a moving body possesses momentum, we sense in a melodic progression an impulse that carries it onward. Physical concepts provide a vivid language for the inner forces we experience in tones.¹⁷

This energy passes through the entire progression and can be felt in every tone belonging to it. A sustained tone may be full of tension: we hear in it the momentum of what preceded it and the pull toward what follows. Even when the pitch remains unchanged, something within the tone still “seeks” to move.

A familiar example is the leading tone. In C major, the note B tends to sound as though it wants to rise to C and find repose there. Its acoustic pitch alone does not explain this striving; it emerges from the note’s place in the musical progression. Kurth sees the leading tone as a particularly striking expression of kinetic energy, which is felt in different degrees and forms in the other tones of a melody as well.¹⁸

The line traces the path of motion; the force is the momentum we experience within it.

When Music Heats Up

Kurth’s physical vocabulary takes a particularly surprising turn in his discussion of chromaticism. To motion, force, and energy he now adds another concept: heat.

Chromatic alterations can create new attractions between tones and intensify the urge to continue. In C major, for example, F-sharp may pull toward G with an intensity reminiscent of B’s pull toward C. According to Kurth, chromaticism heightens the sensation of kinetic energy; the introduction of chromatic alterations into the melodic progression produces, in his words, “a tremendous heating-up of linear development.” He goes on to speak even of Überhitzung—an “overheating” of tensions.¹⁹

This heating-up continues his portrayal of music as a system of forces: attractions grow stronger, tensions accumulate, and the progression becomes more charged and turbulent. The word “heat” gives palpable expression to the intensity of this inner activity.

The parallel with the Chassidic statement with which we began now becomes especially striking: “For a nigun is motion, and every motion gives rise to warmth and emotional stirring.” Kurth describes a heating-up within the musical progression; Chassidus also describes what motion does to the soul—the warmth and emotional awakening it brings about. And the Rebbe Rayatz carries the connection further: “Warmth is a vessel for vitality.” Motion in a nigun carries energy, and in its encounter with the soul it awakens warmth and vitality.²⁰

The Motion Within a Single Tone

Musical motion can be revealed even within a sustained tone. Kurth finds a vivid example in vibrato: the tone remains around the same pitch, but its inner oscillation gives it a sense of activity and motion.

Kurth rejects the explanation that reduces vibrato to a change of tone color. For him, vibrato expresses the urge to introduce movement into something that seems static. The oscillation intensifies the tone, lifts it out of an energyless state, and makes what he calls “musical life” begin to stir and vibrate within it.²¹ He therefore sees the trill and mordent, too, not merely as external ornaments but as more developed forms of the same resistance to rest and the same kinetic energy. Here “vitality” is no distant metaphor: even within a single tone we can hear the difference between a static condition and one filled with trembling, striving, and intensity.²²

The Pulse of Music

The principle of motion is not confined to pitch. Kurth applies it to rhythm as well. Theory can describe rhythm in terms of durations, beats, accents, and measures; but in his view these are the outward forms in which something deeper takes shape: forward impetus, motion, and propelling force. He therefore includes rhythm within the domain of “energy of motion.”²³

A musical beat is, in one sense, like a footstep. A step is not the whole movement but a moment at which ongoing movement acquires weight and makes contact. Likewise, musical beats are not simply a series of recurring marks; a process flows beneath them. Music can therefore sound alive and full of motion even when every beat is not explicitly accented. Rhythmic energy lies in the way musical time is propelled forward.

The tones rise and fall, the pulse carries them onward, and the tension between them gives music momentum and direction.

Motion Within Silence

One of the most powerful demonstrations that music is more than sound is found precisely where there is no sound: in the rest. The tones fall silent, yet the musical event continues. Tension and force may accumulate in the silence, momentum may persist, or a process of release may unfold. Silence itself acquires weight and character and becomes part of the musical utterance.

Kurth devotes a discussion to “The Dynamics of Rests.” He describes how melodic energy does not go out when the sound ceases, but continues to act within the “seeming emptiness” of the rest, filling it with a state of tension and force. Even after the final tone of a musical progression, the dynamic sensation does not vanish at once but gradually subsides.²⁴ Musical motion, then, is not identical with acoustic vibration: the sound has ended, but tension, momentum, or release continues in musical experience. Silence itself becomes part of the progression—music continues to happen within it.

How fitting here are the words of the Zohar: “An inner voice that cannot be heard.”²⁵

The “Conservation of Energy” in Music

In polyphonic music, the principle of motion reveals itself on a larger scale: several independent melodic lines unfold simultaneously, each with its own momentum, tensions, and points of repose. In his discussion of Bach’s polyphony, Kurth shows how the voices complement one another’s motion. When one voice settles, lingers, or falls silent, another continues moving; nor do the climaxes of momentum necessarily occur at the same moment in every voice.²⁶

We might see this as a kind of musical “conservation of energy”: the focus of activity passes from voice to voice, while the overall motion is maintained. What comes to rest in one voice continues to act in another. The ear follows the separate lines and senses within them an unbroken musical current.

An Old Musical Term Comes Alive

We can now return to the European term movement, encountered at the beginning of our journey, and discover the richer meaning embedded in its history. As early as 1668, the French singing teacher and composer Bénigne de Bacilly wrote about mouvement in singing and objected to identifying it with tempo or meter alone. He described it as “a certain quality that gives soul to singing”: it captures the listeners’ attention and can awaken in their hearts the emotion the performer wishes to express.²⁷

Long before Kurth developed his theory of musical energy, Bacilly had already connected movement with the soul of singing. From the performer’s perspective, he pointed to a quality that is difficult to capture by measuring speed or counting beats—that inner vitality through which singing touches the heart.

The familiar term now takes on a new depth. At the outset we encountered “movement” as the ordinary name for a section of a musical work and wondered what, in fact, moves within it. After this inquiry, we can hear the word in its living sense as well: the impetus, attraction, and flow that breathe life into tones. The word we had grown accustomed to using almost without thought begins to speak again—and to tell us something about the essence of music.

Yuval: Motion in the Name of the Father of Music

Here something remarkable emerges: the name of Yuval, the father of music, contains an allusion to music’s very essence.

The Torah says of Yuval: “He was the father of all who play the harp and the pipe.” The Alter Rebbe explains his name: “Yuval denotes leading or conducting … for he draws forth and directs the manner in which delight is drawn into sound.” Here, “leading” means drawing forth inner delight and bringing it into audible expression through the musical progression.²⁸

Thus the father of music bears in his very name the principle of motion that lies at the foundation of music itself.

And not melody alone: rhythm, harmony, ornaments, vibrato, and even the rest—all emerge, from this perspective, as different expressions of motion and its forces. Music theory as a whole reveals itself, in a profound sense, as a theory of motion, and the laws of music as laws of motion.

The name “Yuval” thus becomes a key to the question that has accompanied us throughout this inquiry: What is music? Motion.

From the Secrets of Torah to the Secret of Music

Human inquiry begins with what is perceptible to us. We hear tones, sense tensions and attractions, ask what joins the tones into a melody, and seek to uncover the forces at work beneath the audible surface. This was Kurth’s approach: starting from musical experience, he worked toward the psychic motion that sustains melody. In the twentieth century he gave that motion a systematic psychological formulation.

The Torah approaches the world from another source. It is the wisdom of the Holy One, blessed be He, through which and according to which the world was created. Chassidic discourses do not need to reconstruct the inner essence of a nigun from its audible tones. They illuminate directly the essence of the nigun and its purpose and ultimate meaning.

Listening Between the Notes

After this journey, the short Chassidic statement with which we began emerges in a new depth: “For a nigun is motion, and every motion gives rise to warmth and emotional stirring.” How much musical experience is contained in so few words! What has required an entire investigation—from individual tones to the line, from the line to the force pulsing within it, and finally to motion persisting even within silence—appears here in a concise definition that touches the heart of the matter.²⁹

Here we discover the power of the Chassidic perspective to penetrate the inner dimension of music. Within distinct, separate tones it recognizes the vitality that carries them; within the audible melody, the motion that acts upon the soul. The familiar expression tenuos ha-nigun—“the movements of a nigun”—contains an entire conception of music, and an ordinary phrase suddenly becomes precious and illuminating.

Just as we can read between the lines, we can also listen between the notes: sense the attraction that binds them, the momentum passing through them, and the tension that continues to act even after they fall silent. The Chassidic definition teaches us to listen in this way—to discover within the audible fabric the motion that brings it to life.

And through such listening, the Alter Rebbe’s words shine with new clarity: “The revelation of the movement awakens the revelation of the heart.”³⁰ The inner vitality of the nigun becomes perceptible, and the heart awakens with it.

The Motion That Never Fades

Kurth describes a historical shift in the place of motion within music. In earlier music, through the styles of the Renaissance and Baroque, motion stands at the center of the composition. With the consolidation of the Classical style, however, rhythmic regularity, symmetry, and harmonic structure gain greater prominence, while the independence of melodic motion grows weaker.³¹

History changes the face of music. Musical styles change, and methods of composition give way to others.

The Torah reveals the principle that does not change.

And not only in our understanding, but in the nigunim themselves. From the biblical cantillation marks, called in the Zohar tenuos ha-te’amim, “the movements of the cantillation marks,” to the world of Chassidic song—motion continues to stand at the heart of the nigun.

For a nigun is motion.