One substance cannot be produced by another substance. Hence it follows that a substance cannot be produced by anything external to itself. Existence belongs to the nature of substance. Every substance is necessarily infinite. Each particular attribute of the one substance must be conceived through itself.
Substance absolutely infinite is indivisible.
Besides God no substance can be granted or conceived. Whatsoever is, is in God, and without God nothing can be, or be conceived. 16, Cor. 1. 16, Cor. 2. It also follows that God is a cause in himself, and not through an accident of his nature.