Another part of God’s fulness which he communicates, is his happiness. This happiness consists in enjoying and rejoicing in himself; and so does also the creature’s happiness. It is a participation of what is in God; and God and his glory are the objective ground of it. The happiness of the creature consists in rejoicing in God; by which also God is magnified and exalted. Joy, or the exulting of the heart in God’s glory, is one thing that belongs to praise. So that God is all in all, with respect to each part of that communication of the divine fulness which is made to the creature. What is communicated is divine, or something of God; and each communication is of that nature, that the creature to whom it is made, is thereby conformed to God, and united to him: and that in proportion as the communication is greater or less. And the communication itself is no other, in the very nature of it, than that wherein the very honour, exaltation, and praise of God consists.
– Jonathan Edwards
The Works of Jonathan Edwards Vol. 1 (Peabody, MA; Hendrickson Publishers, Inc; 2007) p. 101. The End For Which God Created The World