E1P17D
Demonstration — Part I
Latin
Ex sola divinæ naturæ necessitate vel (quod idem est) ex solis ejusdem naturæ legibus infinita absolute sequi modo propositione 16 ostendimus et propositione 15 demonstravimus nihil sine Deo esse nec concipi posse sed omnia in Deo esse; quare nihil extra ipsum esse potest a quo ad agendum determinetur vel cogatur atque adeo Deus ex solis suæ naturæ legibus et a nemine coactus agit. Q.E.D.
English (Elwes 1883)
We have just shown (in Prop. xvi.), that solely from the necessity of the divine nature, or, what is the same thing, solely from the laws of his nature, an infinite number of things absolutely follow in an infinite number of ways; and we proved (in Prop. xv.), that without God nothing can be nor be conceived but that all things are in God. Wherefore nothing can exist; outside himself, whereby he can be conditioned or constrained to act. Wherefore God acts solely by the laws of his own nature, and is not constrained by anyone. Q.E.D.
Modern English
We have just shown (E1P16) that from the necessity of the divine nature alone, or, what is the same, from the laws of that nature alone, infinitely many things follow absolutely. And we demonstrated (E1P15) that nothing can exist or be conceived without God, but that all things are in God. So there can be nothing outside him by which he would be determined or coerced to act. Therefore God acts from the laws of his own nature alone, and is coerced by no one. Q.E.D.