It is also written in your law, that the testimony of two men is true.
All Commentaries on John 8:17 Go To John 8
Cyril of Alexandria
AD 444
Having said that God the Father will co-judge and co-condemn those who blaspheme against Him, He taketh the pair of Persons unto something else that is profitable. For I (He says) will not refuse to tell you what I am by Nature. For I am the Light of the world. And I would not seem to any to be fond of boasting: for not in external endowments but in those that accrue to Me Essentially do I glory. But if in saying this, I seem to you not competent to receive from you approval for truth, because I am alone and have witnessed to Myself, I will take to Me God the Father co-working and co-witnessing to My Endowments. For He co-works with Me (He says) as ye see, and co-operates. For as far as regards human nature, I should not do any thing at all, if I possessed not the being God by Nature: as far as regards My being of the Father, and having in Myself the Father, I confess that I can accomplish all things, and am witnessed to by the Nature of Him who begat Me: for as having Him in Myself by means of Sameness of Nature, I come to the achieving of all things unhindered. For our Lord Jesus Christ hath of the Divine Nature all-creative Power as God even though He became Man, and He is witnessed to by the Father, having Him Co-worker in all things according as is said by Him, Of Myself I do nothing, but the Father that dwelleth in Me, Himself doeth the works. But we deem that the Father co-works with the Son, not as introducing some other power of His own for the achievement of the things done, to one who was wanting in power (for if we thus conceive, we shall concede that both the Power of the Father and that of the Son are surely imperfect, if ought of miracle be wrought by Them Both, as though One were not sufficient for the need) but conceiving of, and taking the words in more pious wise, we shall say that since there is in Father and Son One Godhead, and the un-differing Authority and Power of the Same Nature, the works of the Son will surely be those of God the Father, those again of God the Father, the works of the Son.
But He saith, I do nothing of Myself, not as though a servant or under-worker, or in position of a learner, and waiting to be commanded by the Father, or instructed in order to accomplish wonders: but rather signifying with all precision, that having sprung of the Essence of God the Father, and like Light produced Ineffably and without beginning from His Innermost Bosom and Eternally co-with Him, and conceived of and being the Image and Impress of His Person, He hath the same Mind so to speak with Him, |573 and the same energy in everything. For that He might clearly teach that He is Co-willer in all things with Him Who begat Him, He says, I do nothing of Myself. Just as though He said, I am not turned out to any private will of My own, which is not in God the Father. Whatever the Nature of the Father wills and judges, this same is surely in Me too, since I beamed forth of His Bosom, and am the Very Fruit of His Essence.
Hard then are these things to explain, and that which is unattainable by the very understanding may not without difficulty be unfolded through the tongue: nevertheless bringing such things as far as in us lays to a pious view, we shall gain to ourselves heavenly reward, and thus preserve our mind unwounded and unmoved by turnings aside unto ought else.
But we must note that the Saviour adding and crying to the Jews, And in your Law is it written, persuades the Pharisees as of necessity to admit the pair of Persons. For I (He says) bear witness of Myself, and the Father will be with Me herein: will therefore the pair of witnesses confirmed by the book of the Law, be accepted by you, or will ye again, looking only to your envy at Me, not keep even the Law that ye admire?
