I have on my table a violin string. It is free to move in any direction I like. If I twist one end, it responds; it is free. But it is not free to sing. So I take it and fix it into my violin. I bind it and when it is bound, it is free for the first time to sing.
Those who draw their sustenance from science are blessed. It is for me to only derive an occasional pleasure. This is nothing worthy of conceit, but I am indeed touched by the joys. This book is an ode to such joys, a digest of my collections from various sources.
Melody and harmony are like lines and colors in pictures. A simple linear picture may be completely beautiful; the introduction of color may make it vague and insignificant. Yet color may, by combination with lines, create great pictures, so long as it does not smother and destroy their value.