Sermon of Saint Augustine, Bishop of Hippo
Today the Holy Church piously remembers the sufferings of the Holy Glorious and All-Praised Apostles Peter and Paul.
St. Peter, the fervent follower of Jesus Christ, for the profound confession of His Divinity: “Thou art the Christ, the Son of the Living God,” was deemed worthy by the Savior to hear in answer, “Blessed art thou, Simon … I tell thee, that thou art Peter [Petrus], and on this stone [petra] I build My Church” (Mt.16:16-18). On “this stone” [petra], is on that which thou sayest: “Thou art the Christ, the Son of the Living God” it is on this thy confession I build My Church. Wherefore the “thou art Peter”: it is from the “stone” [petra] that Peter [Petrus] is, and not from Peter [Petrus] that the “stone” [petra] is, just as the Christian is from Christ, and not Christ from the Christian. Do you want to know, from what sort of “rock” [petra] the Apostle Peter [Petrus] was named? Hear the Apostle Paul: “Brethren, I do not want ye to be ignorant,” says the Apostle of Christ, “how all our fathers were all under the cloud, and all passed through the sea; and all were baptized unto Moses in the cloud and in the sea; and did all drink the same spiritual drink: for they drank of that spiritual Rock that followed them: and that Rock was Christ” (1 Cor.10: 1-4). Here is the from whence the “Rock” is Peter.
Our Lord Jesus Christ, in the final days of His earthly life, in the days of His mission to the race of man, chose from among the disciples His twelve Apostles to preach the Word of God. Among them, the Apostle Peter for his fiery ardor was vouchsafed to occupy the first place (Mt.10:2) and to be as it were the representative person for all the Church. Therefore it is said to him, preferentially, after the confession: “I will give unto thee the keys of the Kingdom of Heaven: and whatsoever thou shalt bind on earth, shall be bound in the heaven: and whatsoever thou shalt loose on earth: shall be loosed in heaven” (Mt.16: 19). Therefore it was not one man, but rather the One Universal Church, that received these “keys” and the right “to bind and loosen.” And that it was actually the Church that received this right, and not exclusively a single person, turn your attention to another place of the Scriptures, where the same Lord says to all His Apostles, “Receive ye the Holy Spirit” and further after this, “Whose soever sins ye remit, they are remitted unto them: and whose soever sins ye retain, are retained” (John 20: 22-23); or: “whatsoever ye bind upon the earth, shall be bound in Heaven: and whatsoever ye shall loose on earth, shall be loosened in heaven” (Mt.18:18). Thus, it is the Church that binds, the Church that loosens; the Church, built upon the foundational cornerstone, Jesus Christ Himself (Eph 2:20), doth bind and loosen. Let both the binding and the loosening be feared: the loosening, in order not to fall under this again; the binding, in order not to remain forever in this condition. Therefore “Iniquities ensnare a man, and everyone is bound in the chains of his own sins,” says Wisdom (Prov 5:22); and except for Holy Church nowhere is it possible to receive the loosening.