It is the secret of nature that life lives upon life, as all carnivorous animals live on the flesh of other animals, and sometimes on their own kind. This shows that life sustains its body by the same element of which it is made. Man's body is made of the food he eats, and it is according to the life in the food he eats that his life develops. Little insects which live on flowers create the beauty of the flower in their body. Insects that are fed on leaves sometimes become green and beautiful like a leaf, but insects living in the earth and in dirt have a similar body.

This teaches that man's body depends upon the food he eats. Any decay in the vegetables he eats and any disease in the animal whose flesh he uses, all have their effect on man's health.

Brahmins, who have been the most scientific and philosophical people in the world, have always considered this subject; and one always finds in the race of Brahmins intelligent and superior minds. In the West, although there is continual scientific discovery and discussion on hygienic life, important things in regard to food are overlooked, and this can be explained in a few words as due to the lack of home-life. Many have to take their food in public places where it is impossible for special consideration to be given in this way.

There are, moreover, differences in the animal foods one eats. Some animals are clean, others unclean; and their flesh differs accordingly. This has a great influence on the health and the mind of a person.

The question as to what the mind has to do with bodily food may be answered thus, that as an alcoholic drink has an effect on the mind, so every atom of food even has a particular effect. There are foods of three kinds:

Satva which gives nourishment with calm and peace;
Rajas which gives stimulus to work and move about; and
Tamas which gives sleep, laziness, and confusion.

A healer must become aware of all kinds of foods and their effects so as to prescribe for the patient, and to see whether the food is the cause of the illness, which is so in many cases, and to keep himself in such a condition that he may be able to heal successfully.