If the soul has peace, it will take care of the body, meaning the body will have peace too. The soul is more subtle than the body, therefore it nourishes the body. The body does not nourish the soul because it is more dense or gross. Similarly to, the rain nourishing the earth or water and sunlight nourishing the body.
Meditation allows the soul to nourish the body. The more you do it, the more you realize you are soul and not just a body. Escape the body and experience the soul of the universe.
Nourish the soul to nourish the body.