John Chrysostom
Catena Aurea · Johannesevangelium 2
His mother saith unto the servants, Whatsoever he saith unto you, do it. And there were set there six waterpots of stone, after the manner of the purifying of the Jews, containing two or three firkins apiece. Jesus saith unto them, Fill the waterpots with water. And they filled them up to the brim. And he saith unto them, 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 saith unto him, Every man at the beginning doth set forth good wine; and when men have well drunk, then that which is worse: but thou hast kept the good wine until now. This beginning of miracles did Jesus in Cana of Galilee, and manifested forth his glory; and his disciples believed on him. Jesus saith unto them, Fill the waterpots with water. And they filled them up to the brim.
(Hom. xxii. 2) But why did He not work the miracle before they had filled the waterpots, which would have been much more wonderful; inasmuch as it is one thing to change the quality of some existing substance, another to make it that substance out of nothing? The latter miracle would be the more wonderful, but the former would be the more easy of belief. And this principle often acts as a check, to moderate the greatness of our Lord’s miracles: He wishes to make them more credible, therefore He makes them less marvellous; a refutation this of the perverse doctrine of some, that He was a different Being from the Maker of the world. For we see He performs most of His miracles upon subject-matter already existing, whereas were He contrary to the Creator of the world, He would not use a material thus alien, to demonstrate His own power. He did not draw out the water Himself which He made wine, but ordered the servants to do so. This was for the sake of having witnesses of the miracle; And He saith unto them, Draw out now, and bear unto the governor of the feast.