We are not exactly these physical bodies, we are actually beautiful, eternal specks of consciousness.
Meditation is imperative in understanding this most important fact that the 'self is never annihilated, even when the physical body perishes.
Meditational Energy should be the main source of vitality for the physical body... not food. Meditation is the process of silencing the mind. If a given mind is incessantly wasting its energy, the physical body is depleted of energy and becomes susceptible to attacks... by various bacteria and viruses. The result is a diseased body.
The body-mind is a product of the society's mind, while the soul resides in the physical body. The interactive, fuzzy area between the soul and the world is called as the mind.