Jerome, on Matt 16:13

“And Jesus came into the quarters of Cesarea Philippi: and he asked his disciples, saying: Whom do men say that the Son of man is?”

“As much as to say, You have said to me, Thou art Christ, the Son of the living God, therefore I say unto thee, not in a mere speech, and that goes not on into operation; but I say unto thee, and for Me to speak is to make it sor, that thou art Peter. For as from Christ proceeded that light to the Apostles, whereby they were called the light of the world, and those other names which were imposed upon them by the Lord, so upon Simon who believed in Christ the Rock, He bestowed the name of Peter (Rock.)”

Imported from an open dataset — not yet checked against the printed edition.