Here’s an interesting quote by William Walker Atkinson:

“All through Nature, and Nature’s manifestations, there exists rhythm and Harmony. Everything in the Universe is in unceasing action. There is a universal vibratory movement apparent everywhere. From the atoms, and the particles composing the atoms, up through all the material combinations and groupings there is constant, incessant vibration and motion. And from this constant motion, and running through its entire manifestation, there is apparent a constant and invariable law of rhythm. Just as there is a rhythm apparent in all that we call music, so is there a rhythm in the music of Nature. And from that rhythm proceeds that which we call Harmony.

The planets as they swing in regular orbits around the sun—yes, the suns as they swing around still greater suns—and so on until the mind fails to grasp the wonder of it all—all manifest rhythm. The sea in its manifestation of the rise and fall of the tides, exhibits rhythm. The heart of man breathes in rhythmic measure. In the great waves of light traveling to us from the sun and stars, millions upon millions of miles away, there exists a rhythmic measure registered upon the delicate instruments of science.

You have heard of the wonderful force latent in the rhythmic measure of music. You have read of instances in which mighty bridges have been shattered by the note of the violin constantly sounded in an uninterrupted rhythm.

It seems almost incredible, but it is true that the soft note of a tiny violin, constantly sounded in regular rhythm can become powerful enough to make the bridge first tremble, and then shudder, and then sway to and fro until it finally collapses.

Science teaches us that even the mighty steel skyscrapers of our great cities could be brought to the ground in a mass of twisted steel rods, if one were but to ascertain the keynote of the entire building, and then manage to start into motion the vibrations of a strong musical instrument, constantly sounding that one keynote, over and over again, for hour after hour, until the great giant structure would “catch the motion” and begin to tremble.

“To catch the motion,” that is it. If we could but “catch the motion” of Nature’s great rhythmic harmony we could accomplish anything. And this is not such a wild dream as might be supposed at first glance.

There is a great rhythmic harmony inherent in the mind of man. Just as the bridge has its keynote, so has the mind of each man, and the great mind of the race of men. And if we will but withdraw ourselves from the incidents and distractions of the outer life and retire for a moment or so within the inner regions of ourselves, we may catch the faint echo of that great Universal Harmony of the mind, sounding clear and well defined. If we can do this, we have but to take up the mental keynote and sound it until we make our influence felt.”