This verse shows the remarkable faith of Peter in Jesus. It is said that the Lord worked this miracle either by keeping Peter up with divine power, or by making the water firm and solid.[1][2]
Jerome: "Let those who think that the Lord’s body was not real, because He walked upon the yielding waters as a light æthereal substance, answer here how Peter walked, whom they by no means deny to be man."[3]
Rabanus Maurus: "Lastly, Theodorus wrote that the Lord had not bodily weight in respect of His flesh, but without weight walked on the sea. But the catholic faith preaches the contrary; for Dionysius says that He walked on the wave, without the feet, being immersed, having bodily weight, and the burden of matter."[3]
^John MacEvilly, An Exposition of the Gospel of St. John consisting of an analysis of each chapter and of a Commentary critical, exegetical, doctrinal and moral, Dublin Gill & Son 1879.
^Cornelius Cornelii a Lapide; Thomas Wimberly Mossman The great commentary of Cornelius à Lapide, London: J. Hodges, 1889-1896.