Acharya Prashant explains that our senses are the result of millions of years of biological evolution, designed primarily for the survival, protection, and nourishment of the physical body. He emphasizes that the senses function independently of the intellect; for instance, the eyes of a genius and a madman function similarly because they are biological tools. The senses are naturally programmed to protect the body, such as the tongue rejecting extreme heat or the ears alerting us to potential threats like a snake's hiss. This innate knowledge is a result of evolutionary training and is essential for physical preservation.