John 2:8-10
“Draw out now, and bear unto the governor of the feast; and they bare it. When the ruler of the feast had tasted the water that was made wine, and knew not whence it was, (but the servants which drew the water knew,) the governor of the feast called the bridegroom, and says unto him, Every man at the beginning does set forth good wine, and when men have well drunk, then that which is worst; but you have kept the good wine until now.”
Here again some mock, saying, “this was an assembly of drunken men, the sense of the judges was spoilt, and not able to taste what was made, or to decide on what was done, so that they did not know whether what was made was water or wine: for that they were drunk,” it is alleged, “the ruler himself has shown by what he said.” Now this is most ridiculous, yet even this suspicion the Evangelist has removed. For he does not say that the guests gave their opinion on the matter, but “the ruler of the feast,” who was sober, and had not as yet tasted anything. For of course you are aware, that those who are entrusted with the management of such banquets are the most sober, as having this one business, to dispose all things in order and regularity; and therefore the Lord called such a man's sober senses to testify to what was done. For He did not say, “Pour forth to them that sit at meat,” but, “Bear unto the governor of the feast.”
“And when the ruler of the feast had tasted the water that was made wine, and knew not whence it was, (but the servants knew,) the governor of the feast called the bridegroom.” “And why did he not call the servants? For so the miracle would have been revealed.” Because Jesus had not Himself revealed what had been done, but desired that the power of His miracles should be known gently, little by little. And suppose that it had then been mentioned, the servants who related it would never have been believed, but would have been thought mad to bear such testimony to one who at that time seemed to the many a mere man; and although they knew the certainty of the thing by experience, (for they were not likely to disbelieve their own hands,) yet they were not sufficient to convince others. And so He did not reveal it to all, but to him who was best able to understand what was done, reserving the clearer knowledge of it for a future time; since after the manifestation of other miracles this also would be credible. Thus when he was about to heal the nobleman's son, the Evangelist has shown that it had already become more clearly known; for it was chiefly because the nobleman had become acquainted with the miracle that he called upon Him, as John incidentally shows when he says, “Jesus came into Cana of Galilee, where He made the water wine.” And not wine simply, but the best.
3. For such are the miraculous works of Christ, they are far more perfect and better than the operations of nature. This is seen also in other instances; when He restored any infirm member of the body, He made it better than the sound.
That it was wine then, and the best of wine, that had been made, not the servants only, but the bridegroom and the ruler of the feast would testify; and that it was made by Christ, those who drew the water; so that although the miracle were not then revealed, yet it could not in the end be passed in silence, so many and constraining testimonies had He provided for the future. That He had made the water wine, He had the servants for witnesses; that the wine was good that had been made, the ruler of the feast and the bridegroom.
It might be expected that the bridegroom would reply to this, (the ruler's speech,) and say something, but the Evangelist, hastening to more pressing matters, has only touched upon this miracle, and passed on. For what we needed to learn was, that Christ made the water wine, and that good wine; but what the bridegroom said to the governor he did not think it necessary to add. And many miracles, at first somewhat obscure, have in process of time become more plain, when reported more exactly by those who knew them from the beginning.
Source: Homilies on the Gospel of John (New Advent)