A plant requires sun or light to exist, just like us. e leaves draw light from the sun and turns the light into kai or food. The kai in the form of food, nourishes the body. The kai in the form of light, nourishes our wairua or spirit. Both forms of kai are equal in energy and force because both feed us, but in different ways. The sustenance of the kai occurs in different realms, the physical and the spirit. Yet they are both the same.