(5) And I say also unto thee, That thou art (l) Peter, and upon this rock I will build my church; and the (m) gates of hell shall not prevail against it.
(5) That is true faith, which confesses Christ, the virtue of which is invincible.
(l) Christ spoke in the Syrian tongue, and therefore did not use this discourse to distinguish between Petros, which signifies Peter, and Petra, which signifies a rock, but in both places used the word Cephas: but his meaning is what is written in Greek, in which the different word endings distinguish between Peter, who is a piece of the building, and Christ the Petra, that is, the rock and foundation: or else he named him Peter because of the confession of his faith, which is the Church's as well as his, as the old fathers witness, for so says Theophylact. That confession which you have made, shall be the foundation of the believers.
(m) The enemies of the Church are compared to a strong kingdom, and therefore by "gates" are meant cities which are made strong with wise preparation and fortifications, and this is the meaning: whatever Satan can do by cunning or strength. So does Paul, calling them strongholds; (2 Corinthians 10:4).