The Divine Essence
...omnipotence is the divine essence itself apprehended as free from every obstacle in acting; eternity is the essence of God as without limit in duration; and so of the rest.
Francis Turretin, Institutes of Elenctic Theology, ed. James T. Dennison Jr., trans. George Musgrave Giger, vol. 1 (Phillipsburg, NJ: P&R Publishing, 1992-1997), 188.