1 You remember, beloved, in the former discourses—for it was both read in the Gospel and also discussed by us according to our ability—how that the Lord Jesus went up to the feast-day, as it were in secret, not because He feared lest He should be laid hold of—He who had the power not to be laid hold of—but to signify that even in that very feast which was celebrated by the Jews He Himself was hidden, and that the mystery of the feast was His own. In the passage read today then, that which was supposed to be timidity appeared as power; for He spoke openly on the feast-day, so that the crowds marvelled, and said that which we have heard when the passage was read: “Is not this he whom they sought to kill? And, lo, he speaks openly, and they say nothing. Do the rulers know indeed that this is the Christ?” They who knew with what fierceness He was sought after, wondered by what power He was kept from being taken. Then, not fully understanding His power, they fancied it was the knowledge of the rulers, that these rulers knew Him to be the very Christ, and that for this reason they spared Him whom they had with so much eagerness sought out to be put to death.
Source: Tractates on the Gospel of John (New Advent)