One nourishes the tree by watering its root, and one nourishes the body by feeding the stomach, for if the body is to be kept in a healthy state, then the parts of the body must cooperate to feed the stomach. Similarly, the Supreme Lord is the enjoyer and the creator, and we, as subordinate living beings, are meant to cooperate to satisfy Him. This cooperation will actually help us, just as food taken by the stomach will help all other parts of the body.