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.
The mind thinks of the self as separate, the heart knows better. As one great Indian master, Sri Nisargatta, put it, "The mind creates the abyss, and the heart crosses it."