PURPORT

The living condition in the material existence depends more or less on one's intelligence and powerful living energy. Intelligence to counteract the hard struggle for existence is assisted by the senses for acquiring knowledge, and the living energy is maintained by manipulating the active organs, like hands and legs, etc. But on the whole, the struggle for existence is an exertion of the mode of passion. Therefore all the sense organs, headed by intelligence and the living energy, prana, are different products and byproducts of the second mode of nature, called passion. This mode of passion is, however, the product of the air element, as described before.