Two substances, whose attributes are different, have nothing in common. Things which have nothing in common cannot be one the cause of the other. There cannot exist in the universe two or more substances having the same nature or attribute. 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.