Rhythm pervades the universe.

The swing of the planets around the sun; the rise and fall of the sea; the beating of the heart; the ebb and flow of the tide; all follow rhythmics laws.

The rays of the sun reach us; the rain descends upon us, in obedience to the same law.

All growth is but an exhibition of this law.

All motion is a manifestation of the law of rhythm.
Our bodies are as much subject to rhythmic laws as is the planet in its revolution around the sun.