If I do not the works of my Father, believe me not.
All Commentaries on John 10:37 Go To John 10
Cyril of Alexandria
AD 444
What He says is this. Though it is easy for any one to call God Father, yet to demonstrate the fact by works is hard and impossible to a creature. By works however of a God-befitting character, He says, I am seen to be equal to God the Father: and there is no defence for your unbelief since you have learnt that I am equal to the Father by the evidence of the God-befitting works which I do, although as regards the flesh I seemed to be one among you like an ordinary man. Hence it is possible to perceive that I am in the Father and the Father in Me. For the sameness of their Essence makes the Father to be and to be seen in the Son, and the Son in the Father. For truly even among ourselves the essence of our father is recognised in him that is begotten of him, and in the parent again that of the child. For the delineation of their nature is one in them all, and they all are by nature one. But when we distinguish ourselves by our bodies, the many are no longer one; a distinction which cannot be mentioned concerning One Who is God by Nature, for whatever is Divine is incorporeal, although we conceive of the Holy Trinity as in distinct Subsistences. For the Father is the Father and not the Son; the Son again is the Son and not the Father; and the Holy Spirit is peculiarly the Spirit: although They are not at variance, through Their fellowship and unity One with Another.
The Holy Trinity is known in the Father and in the Son and in the Holy Spirit. But the designation of each one of These Who have been enumerated denotes not a part of the Trinity, but the Whole of It; since in truth God is undivided and simple, although distributed in These Subsistences.