1p14d.md (657B)
1 As God is a being absolutely infinite, of whom no 2 attribute that expresses the essence of substance can be denied 3 (by Def. vi.), and he necessarily exists (by Prop. xi.); if any 4 substance besides God were granted, it would have to be explained 5 by some attribute of God, and thus two substances with the same 6 attribute would exist, which (by Prop. v.) is absurd; therefore, 7 besides God no substance can be granted, or, consequently, be 8 conceived. If it could be conceived, it would necessarily have 9 to be conceived as existent; but this (by the first part of this 10 proof) is absurd. Therefore, besides God no substance can be 11 granted or conceived. Q.E.D. 12 13