St. Maximus of Turin

“This Peter on whom Christ freely bestowed a sharing in his name. For just as Christ is the Rock, as the Apostle Paul taught, so through Christ Peter is made Rock, when the Lord says to him: ‘Thou art Peter and upon this rock I will build My church.’ ” (Homilia LXVIII, Patrologia Latina 57 [c. A.D. 380-465]).