On the other hand, I suppose that someone who is healthy and moderate with himself goes to sleep only after having done the following: First, he rouses his rational part and feasts it on fine arguments and speculations; second, he neither starves nor feasts his appetites, so that they will slumber and not disturb his best part with either their pleasure or their pain, but they'll leave it alone, pure and by itself, to get on with its investigations, to yearn after and perceive something