Full Idea
God is the source of possibilities and of existents alike, the one by his essence and the other by his will.
Gist of Idea
God's essence is the source of possibilities, and his will the source of existents
Source
Gottfried Leibniz (New Essays on Human Understanding [1704], 2.15)
Book Reference
Leibniz,Gottfried: 'New Essays on Human Understanding', ed/tr. Remnant/Bennett [CUP 1996], p.155
A Reaction
Every now and then I rebel against metaphysics, and think 'how do these people know all this great things about which they make these dogmatic claims?' And this is one of those occasions. I get the idea, though...