5 It is because of an indubitable mystery that He appears not to acknowledge His mother, from whom as the Bridegroom He came forth, when He says to her, “Woman, what have I to do with you? Mine hour is not yet come.” What is this? Did He come to the marriage for the purpose of teaching men to treat their mothers with contempt? Surely he to whose marriage He had come was taking a wife with the view of having children, and surely he wished to be honored by those children he would beget: had Jesus then come to the marriage in order to dishonor His mother, when marriages are celebrated and wives married with the view of having children, whom God commands to honor their parents?
Beyond all doubt, brethren, there is some mystery lurking here. It is really a matter of such importance that some—of whom the apostle, as we have mentioned before, has forewarned us to be on our guard, saying, “I fear, lest, as the serpent beguiled Eve by his subtlety, so also your minds should be corrupted from the simplicity and chastity which is in Christ,”— taking away from the credibility of the gospel, and asserting that Jesus was not born of the Virgin Mary, used to endeavor to draw from this place an argument in support of their error, so far as to say, How could she be His mother, to whom He said, “Woman, what have I to do with you?”
Wherefore we must answer them, and show them why the Lord said this, lest in their insanity they appear to themselves to have discovered something contrary to wholesome belief, whereby the chastity of the virgin bride may be corrupted, that is, whereby the faith of the Church may be injured. For in very deed, brethren, their faith is corrupted who prefer a lie to the truth. For these men, who appear to honor Christ in such wise as to deny that He had flesh, do nothing short of proclaiming Him a liar.
Now they who build up a lie in men, what do they but drive the truth out of them? They let in the devil, they drive Christ out; they let in an adulterer, shut out the bridegroom, being evidently paranymphs, or rather, the panderers of the serpent. For it is for this object they speak, that the serpent may possess, and Christ be shut out. How does the serpent possess? When a lie possesses. When falsehood possesses, then the serpent possesses; when truth possesses, then Christ possesses.
For Himself has said, “I am the truth;” but of that other He said, “He stood not in the truth, because the truth is not him.” And Christ is the truth in such wise that you should receive the whole to be true in Him. The true Word, God equal with the Father, true soul, true flesh, true man, true God, true nativity, true passion, true death, true resurrection. If you say that any of these is false, rottenness enters, the worms of falsehood are bred of the poison of the serpent, and nothing sound will remain.
Source: Tractates on the Gospel of John (New Advent)