Peace of mind has nothing to do with the external world; it has only to do with our connection with God. Love really is the answer. We're here only to teach love. When we're doing that, our souls are singing and dancing. When we remind ourselves that we are spiritual beings, that life and love are the flame eternal, that's when our soul is nourished.
The soul is the greening life force of the flesh, for the body grows and prospers through her, just as the earth becomes fruitful when it is moistened. The soul humidifies the body so it does not dry out, just like the rain which soaks into the earth.