Firstly “Substance is a thing that is capable of activity, it is compound or simple, the compound cannot exist without the simple. The monads are simple substances.” The proof that they constitute the truth in all things is very simple, it is a superficial reflection. For instance, one of Leibnitz’s maxims is “Because there are compound things, the principles of the same must be simple, for the compound consists of the simple.”[247] This proof is poor enough, it is an example of the favourite way of starting from something definite, say the compound, and then drawing conclusions therefrom as to the simple. It is quite light in a way, but really it is tautology. Of course, if the compound exists, so does the simple, for the compound means something in itself manifold whose connection or unity is external. From the very trivial category of the compound it is easy to deduce the simple. It is a conclusion drawn from a certain premiss, but the question is whether the premiss is true. These monads are not, however, something abstract and simple in itself, like the empty Epicurean atoms, which, as they were in themselves lacking in determination, drew all their determination from their aggregation alone. The monads are, on the contrary, substantial forms, a good expression, borrowed from the Scholastics (_supra_, p. 71), or the metaphysical points of the Alexandrian School (Vol II. p. 439), they are the entelechies of Aristotle taken as pure activity, which are forms in themselves (Vol II. pp. 138, 182, 183). “These monads are not material or extended, nor do they originate or decay in the natural fashion, for they can begin only by a creative act of God, and they can end only by annihilation.”[248] Thereby they are distinguished from the atoms, which are regarded simply as principles. The expression creation we are familiar with from religion, but it is a meaningless word derived from the ordinary conception; in order to be a thought and to have philosophic significance, it must be much more closely defined.