1p6c.md (360B)
1 Hence it follows that a substance cannot be produced by anything external to 2 itself. For in the universe nothing is granted, save substances and their 3 modifications (as appears from Ax. i. and Deff. iii. and v.). Now (by the last 4 Prop.) substance cannot be produced by another substance, therefore it cannot be 5 produced by anything external to itself. Q.E.D. 6 7