On the Holy Trinity

⁴⁸ But because it is most difficult to distinguish generation from procession in that co-eternal, and equal, and incorporeal, and ineffably unchangeable and indivisible Trinity, let it suffice meanwhile to put before those who are not able to be drawn on further, what we said upon this subject in a sermon to be delivered in the ears of Christian people, and after saying wrote it down. For when, among other things, I had taught them by testimonies of the Holy Scriptures that the Holy Spirit proceeds from both, I continue: “If, then, the Holy Spirit proceeds both from the Father and from the Son, why did the Son say, 'He proceeds from the Father.' Why, think you, except as He is wont to refer to Him, that also which is His own, from whom also He Himself is? Whence also is that which He says, 'My doctrine is not my own, but His that sent me?' If, therefore, it is His doctrine that is here understood, which yet He said was not His own, but His that sent Him, how much more is it there to be understood that the Holy Spirit proceeds also from Himself, where He so says, He proceeds from the Father, as not to say, He proceeds not from me? From Him, certainly, from whom the Son had his Divine nature, for He is God of God, He has also, that from Him too proceeds the Holy Spirit; and hence the Holy Spirit has from the Father Himself, that He should proceed from the Son also, as He proceeds from the Father. Here, too, in some way may this also be understood, so far as it can be understood by such as we are, why the Holy Spirit is not said to be born, but rather to proceed; since if He, too, was called a Son, He would certainly be called the Son of both, which is most absurd, since no one is son of two, save of father and mother. But far be it from us to surmise any such thing as this between God the Father and God the Son. Because not even the son of men proceeds at the same time from both father and mother; but when he proceeds from the father into the mother, he does not at that time proceed from the mother; and when he proceeds from the mother into this present light, he does not at that time proceed from the father. But the Holy Spirit does not proceed from the Father into the Son, and from the Son proceed to sanctify the creature, but proceeds at once from both; although the Father has given this to the Son, that He should proceed, as from Himself, so also from Him. For we cannot say that the Holy Spirit is not life, while the Father is life, and the Son is life: and hence as the Father, while He has life in Himself, has given also to the Son to have life in Himself; so has He given also to Him that life should proceed from Him, as it also proceeds from Himself.” I have transferred this from that sermon into this book, but I was speaking to believers, not to unbelievers.

49. But if they are not competent to gaze upon this image, and to see how true these things are which are in their mind, and yet which are not so three as to be three persons, but all three belong to a man who is one person; why do they not believe what they find in the sacred books respecting that highest Trinity which is God, rather than insist on the clearest reason being rendered them, which cannot be comprehended by the human mind, dull and infirm as it is? And to be sure, when they have steadfastly believed the Holy Scriptures as most true witnesses, let them strive, by praying and seeking and living well, that they may understand, i.e. that so far as it can be seen, that may be seen by the mind which is held fast by faith. Who would forbid this? Nay, who would not rather exhort them to it? But if they think they ought to deny that these things are, because they, with their blind minds, cannot discern them, they, too, who are blind from their birth, ought to deny that there is a sun. The light then shines in darkness; but if the darkness comprehend it not, let them first be illuminated by the gift of God, that they may be believers, and let them begin to be light in comparison with the unbelievers; and when this foundation is first laid, let them be built up to see what they believe, that at some time they may be able to see. For some things are so believed, that they cannot be seen at all. For Christ is not to be seen a second time on the cross; but unless this be believed which has been so done and seen, that it is not now to be hoped for as about to be and to be seen, there is no coming to Christ, such as without end He is to be seen. But as far as relates to the discerning in some way by the understanding that highest, ineffable, incorporeal, and unchangeable nature the sight of the human mind can nowhere better exercise itself, so only that the rule of faith govern it, than in that which man himself has in his own nature better than the other animals, better also than the other parts of his own soul, which is the mind itself, to which has been assigned a certain sight of things invisible, and to which, as though honorably presiding in a higher and inner place, the bodily senses also bring word of all things, that they may be judged, and than which there is no higher, to which it is to be subject, and by which it is to be governed, except God.