Russell
"Spheres occur only at wave amplitudes and the fact of its four positive and four negative efforts is the basis of the octave wave from which our spectrum, our octaves of the elements and our octaves of musical tones are derived.
"This 0, 1, 2, 3, 4, 4, 3, 2, 1, 0 octave sequence constitutes the heartbeat of the universe. It is the basis of our musical rhythms, our chemistry, our mathematics, our symmetry of design of all animal, mineral and vegetable forms and of our color spectrum of light." [Walter Russell, Home Study Course, 53 - Unit Nine - Lesson 35]