Disease is often caused by lack of rhythm, be it in thought or feeling, in the breath, in action, or in one's everyday life. For instance, to stay up in the night when one is accustomed to sleep, to change the dinner-hour, to take a nap when one is not accustomed to, to do anything that one is not accustomed to do, puts one out of rhythm. People who are accustomed to be angry or to quarrel would become ill if they were not allowed to do that. There is a story told in India that a person who could not keep any secret was compelled to keep quiet; in the end he became ill, and the doctor had to cure him by permitting him to let it out. All this signifies rhythm; every habit forms a rhythm.