Therefore that disciple whom Jesus loved said unto Peter, It is the Lord. Now when Simon Peter heard that it was the Lord, he girded his fisher's coat unto him, (for he was naked,) and did cast himself into the sea.
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Cornelius a Lapide
AD 1637
Therefore that disciple, &c. You will ask, how was it that John was the first to recognise Christ? Cyril attributes it to the keenness of his intellect. So does S. Chrysostom. Peter, he says, was the more fervent, but John had more sagacity, and therefore was the first to recognise Christ. But I reply that, whilst Peter was occupied in drawing up the net full of great fishes, John more carefully looked at Jesus, and Jesus first presented His appearance to S. John , because He most chiefly loved him, and because he was most pure. Wherefore S. Jerome rightly says (Epist. ad Pammach.), "First is John"s virginity to recognise the virgin form of Christ. "Blessed are the pure in heart, for they shall see God.""
Mystically: the more familiar and intimate any one is with God by prayer, the more does he perceive, penetrate, contemplate, and admire God, and the attributes of God. In fine, as John because of his virginity was dear to Christ, so also he himself wonderfully loves those who are cha...
Again, in this passage, the writer of this book calls himself the beloved disciple----and he would seem to have been thus well beloved on account of his great discernment and purity of mind, and the keenness of his mental vision, and a disposition which enabled him readily to grasp the truth. And, in fact, he seized the meaning of the sign before the rest, and perceived Christ's Presence, and told the rest, entertaining not a shadow of doubt, but crying out to them with a very confident voice, It is the Lord. The inspired Peter leapt into the sea, thinking that to go by the ship would cause delay, for he was always fervent in zeal, and easily stirred up to confidence and love of Christ. The rest followed his lead, with the ship, dragging the net. Then they see a fire of coals, for the Saviour had kindled a fire miraculously, and put a fish upon it that He had caught by His ineffable power; and this too He had done of design. For it was not the hand of the holy Apostles, or the preachin...
It is the Lord. St. Chrysostom says, we may here see the different characters of the two apostles, Peter and John; the former is more ardent, the latter more sublime; the first more vehement, the last more penetrating; for these reasons, John was the first to know Christ, Peter the first to hasten to him. (Hom. lxxxvi.)