3. Whoever loves anything in itself and for itself, wills consequently all things in which that thing is found: as he who loves sweetness in itself must love all sweet things. But God wills and loves His own being in itself and for itself; and all other being is a sort of participation by likeness of His being.
6. The will follows the understanding. But God with His understanding understands Himself in the first place, and in Himself understands all other things: therefore in like manner He wills Himself in the first place, and in willing Himself wills all other things.
This is confirmed by the authority of Holy Scripture: Thou lovest all things that are, and hatest nothing of the things that thou hast made (Wisd. xi, 2)
1.74 : That the Object of the Will of God in the first place is God Himself
1.76 : That with one and the same Act of Will God wills Himself and all other beings