 Leibniz was not satisfied by this conception of divine substance, at least in part because it confines God to what actually exists. For Leibniz, God contains within himself all possibilities, not just the actual world: this latter is just that maximal set of possibilities that he has best reason to actualise. Leibniz acknowledges created substances, though they are very intimately dependent on God. In the Discourse on Metaphysics (Section 14), he says: