For the Father loves the Son, and shows him all things that he himself does: and he will show him greater works than these, that you may marvel.
All Commentaries on John 5:20 Go To John 5
Cyril of Alexandria
AD 444
and sheweth Him all things that Himself doeth;
Needs does He subjoin this too to the preceding; and wherefore, I will say. Fathers who are among us, sometimes overcome by natural affection, bear with their sons grieving them, and seeing them attempt things against their judgment, they often suffer it. For vehement is the yearning love implanted in them in respect of their children persuading them to overcome all littleness of soul towards them. But not thus (saith He) does God the Father love the Son, for He cannot do anything which He too does not work by Nature, but as having One Essence with Him, He is called by certain Physical laws, so to say, to identical Will and Power. The Son then (saith He) worketh nothing contrary to what is pleasing or fitting to the Father, nor does He vaunt Himself in the love of the Father, as though a lover of novelty in His works and unbridled, but whatsoever things He sees Him doing, as in conception, all these He performeth restrained by Identity of Essence from falling aside in ought that is befitting God. For He hath no part with change in ought, or variableness: for He remaineth the Same unceasingly, as the Psalmist says. The Father again sheweth the Son what He Himself doeth, not as though setting before Him things depicted on a tablet, or teaching Him as though ignorant (for He knoweth all things as God): but depicting Himself wholly in the Nature of His Offspring, and shewing in Him His Own Natural Properties in order that from what Properties Himself is and is manifested, He may know of what kind and Who He is by nature That begat Him. Therefore Christ says, that no man knoweth Who the Son is but the Father, and Who the Father is, but the Son. For the accurate knowledge of each is in Both, not by learning, but by Nature. And God the Father seeth the Son in Himself, the Son again seeth the Father in Himself. Therefore He saith, I am in the Father and, the Father in Me. But "to see" and "to be seen" must here be conceived of after a Divine sort.