Ultimately, we become aware of most of what is going on within us mainly through the muscles.

Learning to inhibit unwanted contractions of muscles that function without, or in spite of, our will, is the main task in coordinated action.

Movement is life; without movement life is unthinkable.

If I hold a twenty pound weight, I cannot detect a fly landing on it because the least detectable difference in the stimulus is half a pound. On the other hand, if i hold a feather, a fly landing on it makes a great difference. Obviously then, in order to be able to tell the differences in exertion one must first reduce the exertion. Finer and finer performance is possible only if the sensitivity, that is, the ability to feel the difference is improved.

Our breathing reflects every emotional or physical effort and every disturbance.

No matter how closely we look, it is difficult to find a mental act that can take place without the support of some physical function.

Nothing is permanent about our behavior patterns except our belief that they are so.