The Apostle Paul, formerly Saul, was changed from a robbing wolf into a meek lamb. Formerly he was an enemy of the Church, then is manifest as an Apostle. Formerly he stalked it, then preached it. Having received from the high priests the authority at large to throw all Christians in chains for execution, he was already on the way, he breathed out “threatenings and slaughter against the disciples of the Lord” (Acts 9:1), he thirsted for blood, but “He that dwells in the Heavens shall laugh him to scorn” (Ps 2:4). When he, “having persecuted and vexed” in such manner “the Church of God” (1Cor.15:9; Acts 8:5), he came near Damascus, and the Lord from Heaven called to him: “Saul, Saul, why persecutest thou Me?” and I am here, and I am there, I am everywhere: here is My head; there is My body. There becomes nothing of a surprise in this; we ourselves are members of the Body of Christ. “Saul, Saul, why persecutest thou Me; it is hard for thee to kick against the goad” (Acts 9:4-5). Saul, however, “trembling and frightened”, cried out: “Who art Thou, Lord?” The Lord answered him, “I am Jesus Whom thou persecutest.”

And Saul suddenly undergoes a change: “What wantest Thou me to do?” -- he cries out. And suddenly for him there is the Voice: “Arise, and go to the city, and it shall be told thee what thou must do” (Acts 9:6). Here the Lord sends Ananias: “Arise and go into the street” to a man, “by the name of Saul,” and baptize him, “for this one is a chosen vessel unto Me, to bear My name before the Gentiles, and kings, and the children of Israel” (Acts 9: 11, 15, 18). This vessel must be filled with My Grace. “Ananias, however, answered: Lord, I have heard from many about this man, how much evil he hath done to Thy saints in Jerusalem: and here he hath authority from the chief priests to bind all who call on Thy Name” (Acts 9:13-14). But the Lord urgently commands Ananias: “Search for and fetch him, for this vessel is chosen by Me: for I shall show him what great things he must suffer for My name’s sake” (Acts 9:11, 15-16).

And actually the Lord did show the Apostle Paul what things he had to suffer for His Name. He instructed him the deeds; He did not stop at the chains, the fetters, the prisons and shipwrecks; He Himself felt for him in his sufferings, He Himself guided him towards this day. On a single day the memory of the sufferings of both these Apostles is celebrated, though they suffered on separate days, but by the spirit and the closeness of their suffering they constitute one. Peter went first, and Paul followed soon after him. Formerly called Saul, and then Paul, having transformed his pride into humility. His very name (Paulus), meaning “small, little, less,” demonstrates this. What is the Apostle Paul after this? Ask him, and he himself gives answer to this: “I am,” says he, “the least of the Apostles... but I have labored more abundantly than all of them: yet not I, but the grace of God, which was with me” (1 Cor.15:9-10).

Source:

https://oca.org/saints/lives/2017/06/29/101840-the-holy-glorious-and-all-praised-leaders-of-the-apostles-peter