7 “Verily, verily, I say unto you, The Son cannot of Himself do anything, but what He sees the Father doing; for what things soever He has done, these also the Son does in like manner.” Yes, the heaven, the earth, the sea; the things that are in heaven, on the earth, and in the sea; the visible and invisible, the animals on the land, the plants in the fields, the creatures that swim in the waters, that fly in the air, that shine in heaven; besides all these, angels, virtues, thrones, dominations, principalities, powers; “all were made by Him.”
Did God make all these, and show them when made to the Son, that He also should make another world full of all these? Certainly not. But, on the contrary, what does He say? “For what things soever He has made, these,” not others, but “these also the Son does,” not differently, “but in like manner.” “For the Father loves the Son, and shows Him all things which Himself does.” The Father shows to the Son that souls may be raised, for souls are raised up by the Father and the Son; nor can souls live except God be their life.
If souls, then, cannot live unless God be their life, just as themselves are the life of bodies; what the Father shows to the Son, that is, what He does, He does through the Son. For it is not by doing that He shows to the Son, but by showing He does through the Son. For the Son sees the Father showing before anything is done; and from the Father's showing and the Son's vision, is done what is done by the Father through the Son. So are souls raised up, if they can see that conjunction of unity, the Father showing, the Son seeing, and the creature made by the Father's showing and the Son's seeing; and that thing made by the Father's showing and the Son's seeing, which is neither the Father nor the Son, but beneath the Father and the Son, whatever is made by the Father through the Son.
Who sees this?
Source: Tractates on the Gospel of John (New Advent)