Inside cleanliness, daily clearing the bowels. In the yoga system this is very necessary. They have got a system if the bowel is not clear, then dhokhi—it is called dhokhi. The intestines should be cleared. So they have a process. Some of the yogīs, they are so expert that they can take out the intestine from the abdomen and clear it and put it again. Yes. This is . . . these are the perfection of yoga system.
So inside cleanliness is very important thing. If the bowel is not clear, if the stools are congested . . . the appendicitis disease, it means that those who are constipated, gradually inside their stool becomes dry, and it becomes a block to the intestine. So if it becomes too much blocked, if it is not possible to be cleared, then the modern medical science, they cut the abdomen and cut the part and clear it, and again stitch it. That is appendicitis, so far I know—I am not medical man. There are so many diseases that is due to this non clearance of the intestines. You see?
Therefore we have to eat in such proportion and such kind of food that inside intestines may remain always clear. In a Bengali proverb there is a saying that bhuri and muri. If your these two things are very clear, then there is no question of disease. Bhuri means this abdomen, and muri means this head. If you keep your head and the belly very clear, then you are free from all disease.