Tractates on the Gospel of John

³ But the catholic faith has it, that the works of the Father and of the Son are not separable. This is what I wish, if possible, to speak to you, beloved; but, according to those words of the Lord, “he that is able to receive it, let him receive it.” But he that is not able to receive it, let him not charge it on me, but on his own dullness; and let him turn to Him that opens the heart, that He may pour in what He freely gives. And, lastly, if any one may not have understood, because I have not declared it as I ought to have declared it, let him excuse the weakness of man, and supplicate the divine goodness.

For we have within a Master, Christ. Whatever you are not able to receive through your ear and my mouth, turn ye in your heart to Him who both teaches me what to speak, and distributes to you in what measure He deigns. He who knows what to give, and to whom to give, will help him that seeks, and open to him that knocks. And if so be that He give not, let no one call himself forsaken. For it may be that He delays to give something, but He leaves none hungry. If, indeed, He give not at the hour, He is exercising the seeker, He is not scorning the suitor.

Look ye, then, and give heed to what I wish to say, even if I should not be able to say it. The catholic faith, confirmed by the Spirit of God in His saints, has this against all heretical perverseness, that the works of the Father and of the Son are inseparable. What is this that I have said? As the Father and the Son are inseparable, so also the works of the Father and of the Son are inseparable. How are the Father and the Son inseparable, since Himself said, “I and the Father are one?” Because the Father and the Son are not two Gods, but one God, the Word and He whose the Word is, One and the Only One, Father and Son bound together by charity, One God, and the Spirit of Charity also one, so that Father, Son, and Holy Spirit is made the Trinity.

Therefore, not only of the Father and Son, but also of the Holy Spirit; as there is equality and inseparability of persons, so also the works are inseparable. I will tell you yet more plainly what is meant by “the works are inseparable.” The catholic faith does not say that God the Father made something, and the Son made some other thing; but what the Father made, that also the Son made, that also the Holy Spirit made. For all things were made by the Word; when “He spoke and they were done,” it is by the Word they were done, by Christ they were done. For “in the beginning was the Word, and the Word was with God, and the Word was God: all things were made by Him.” If all things were made by Him, God said, Let there be light, and there was light; in the Word He made, by the Word He made.