A man is considered to be situated at a certain status of civilization according to the modes of material nature, and that is manifested by eating, by behaving. Ācāra, vicāra. Ācāra means behavior, and vicāra means judgment. By advancement of education one becomes fixed up to take things by judgment. That is called vicāra. And ācāra means cleanliness or behavior. So ācāra, vicāra. The first-, second- and third-class human being, they are situated in ācāra and vicāra.
And in modern civilization also, they say sometimes that a nation is calculated how far he is civilized by the conjunction of amount of soap. That means . . . the soap-using nation means that cleansed. So cleanliness is still considered as the civilized status of man. Unclean status . . . there are different kinds of cleanliness. Inside, vacaḥ bhyantaraṁ. Cleanliness, simply soap and water cleanliness, is not cleanliness. Inside cleanliness also required.
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.