Catena Aurea on John 3:27–30: John Chrysostom

Or thus; The expression, which standeth, is not without meaning, but indicates that his part is now over, and that for the future he must stand and listen. This is a transition from the parable to the real subject. For having introduced the figure of a bride and bridegroom, he shews how the marriage is consummated, viz. by word and doctrine. Faith cometh by hearing, and hearing by the word of God. (Rom. 10:17) And since the things he had hoped for had come to pass, he adds, This my joy therefore is fulfilled; i. e. The work which I had to do is finished, and nothing more is left, that I can do.