There cannot exist in the universe two or more substances having the same nature or attribute . If only by the difference of their attributes, it will be granted that there cannot be more than one with an identical attribute. One substance cannot be produced by another substance. This is shown still more readily by the absurdity of the contradictory. Existence belongs to the nature of substance .
Every substance is necessarily infinite .
It therefore exists as infinite . 8, Note 2. So, also, those who confuse the two natures, divine and human, readily attribute human passions to the deity, especially so long as they do not know how passions originate in the mind . But, if people would consider the nature of substance , they would have no doubt about the truth of E1P7 . In fact, this proposition would be a universal axiom, and accounted a truism .