John 21:7

7.Therefore the disciple whom Jesus loved saith to Peter. The Evangelist shows, by his example, that it is our duty to raise our hearts to God, whenever we succeed in any thing beyond our expectation; because we ought instantly to remember that this act of kindness has flowed from the favor of Him who is the Author of every blessing. That holy recognition of the grace of God, which dwelt in the heart of John, led him also to the knowledge of Christ; for he does not perceive Christ with his eyes, but, being convinced that the great multitude of fishes has been brought to him by the hand of God, he concludes that it was Christ who had guided his hands. But, as John goes before Peter in faith, so Peter afterwards excels him in zeal, when, disregarding personal danger, he throws himself into the lake. The rest follow in the ship. True, all come to Christ at length, but Peter is actuated by a peculiar zeal in comparison of the others. Whether he crossed over to the shore by walking or by swimming, is uncertain; but let us rest satisfied with knowing that the act of leaving the ship and going on shore was not the result of folly and rashness, but that he advanced beyond the others in proportion to his zeal.