21 Then said He to them again, Peace be unto you: as the living Father sent Me, even so send I you.
Hereby our Lord Jesus Christ ordained the disciples to be guides and teachers of the world, and to be ministers of His Divine mysteries, and also bade them, for the time was now come, like lights to illuminate and enlighten, not merely the country of Judaea, according to the limit of the commandment of the Law, which extended from Dan even unto Beersheba, according to the Scripture, but rather also all under the sun, and men scattered throughout all lands, wheresoever they dwelt. The saying of Paul, therefore, is true: No man taketh the honour unto himself, but he that is called of God. For our Lord Jesus Christ called into His most glorious apostleship, before all others, His own disciples, and firmly fixed the whole earth, which was well-nigh tottering and in the act of falling, pointing out, as God, men to be props thereof who were well able to support it. Therefore, also, He thus spake by the mouth of the Psalmist, concerning the earth and the Apostles: I have fixed the pillars of it; for the blessed disciples were as the pillars and ground of the truth, whom also He says that He sent forth, even as the Father had sent Him; showing at the same time the dignity of their apostle-ship, and the incomparable honour of the power vouchsafed unto them, and also in all likelihood suggesting the method of life the Apostles were to follow. For if He thought it meet that He should send forth His own disciples, even as the Father had sent Him, was it not necessary for those who were destined to imitate His mission to ascertain what the Father sent forth the Son for to do? In divers ways, then, expounding unto us the character of His own mission, He said in one place: I came not to call the righteous, but sinners to repentance; and again: They that are whole have no need of a physician; but they that are sick: and again, in another place: For I am come down from heaven, not to do Mine own Will, but the Will of Him That sent Me; and yet once more: For God sent not His Son into the world to judge the world; but that the world should be saved through Him. Summing up, therefore, in a few words the character of their mission, He says that He sent them even as the Father had sent Him, that they might know thereby that they were bound to call sinners to repentance, and to minister to those who were in evil plight, whether of body or soul, and in all their dealings upon earth, not in any wise to follow their own will, but the Will of Him That sent them, and to save the world by their teaching, so far as was possible. And in truth we shall find the holy disciples eager to show the utmost zeal in performing all these things; and it is not difficult for any one to satisfy himself of this, who has once turned his attention to the Acts of the Apostles, and the words of the holy Paul.
--St. Cyril of Alexandria, Homily on John 20