1 Peter 2. 21-25
Dearly beloved, Christ suffered for us, leaving you an example, that you should follow His steps, Who did no sin, neither was guile found in His mouth. Who when He was reviled, did not revile: when He suffered, He threatened not, but delivered Himself to him that judged Him unjustly: who His own self bore our sins in His body upon the tree: that we, being dead to sins, should live to justice: by whose stripes you were healed. For you were as sheep going astray, but you are now converted to the shepherd and bishop of your souls.
Verse 23. Christ, who was incapable of sinning, did not revile them that reviled him; he suffered all with patience; he willingly gave himself up to Pontius Pilate, that judged him, and condemned him unjustly to the death of the cross: and remember that all he suffered was to satisfy for your sins, that he bore our sins in his own body on the tree of the cross. Remember always this great benefit of your redemption, and of your being called to believe in him, and to be eternally happy by following his doctrine; that all of you were as sheep going astray, lost in your ignorance and in your sins, but that by his grace and by his merits you are now called and converted to Jesus Christ, the great pastor and bishop of your souls. You are happy if you live under his care, inspection, and protection. Wi.
1821: The institution and foundation of the Church
Vatican Council I Session IV (July 18, 1870) Dogmatic Constitution I on the Church of Christ
“The eternal Pastor and Bishop of our souls” [1 Pet. 2:25], in order to render the saving work of redemption perennial, willed to build a holy Church, in which, as in the house of the living God, all the faithful might be contained by the bond of one faith and charity. Therefore, before His glory was made manifest, “He asked the Father, not only for the Apostles but also for those who would believe through their word in Him, that all might be one, just as the Son Himself and the Father are one” [John 17:20 f.]. Thus, then, as He sent the apostles, whom He had selected from the world for Himself, as He himself had been sent by the Father [John 20:21], so in His Church He wished the pastors and the doctors to be “even to the consummation of the world” [Matt. 28:20]. But, that the episcopacy itself might be one and undivided, and that the entire multitude of the faithful through priests closely connected with one another might be preserved in the unity of faith and communion, placing the blessed Peter over the other apostles He established in him the perpetual principle and visible foundation of both unities, upon whose strength the eternal temple might be erected, and the sublimity of the Church to be raised to heaven might rise in the firmness of this faith. * And, since the gates of hell, to overthrow the Church, if this were possible, arise from all sides with ever greater hatred against its divinely established foundation, We judge it to be necessary for the protection, safety, and increase of the Catholic flock, with the approbation of the Council, to set forth the doctrine on the institution, perpetuity, and nature of the Sacred Apostolic Primacy, in which the strength and solidarity of the whole Church consist, to be believed and held by all the faithful, according to the ancient and continual faith of the universal Church, and to proscribe and condemn the contrary errors, so pernicious to the Lord’s flock.