John 17:18

"As Thou hast sent Me into the world, even so have I also sent them into the world." As Paul also saith, "Having put in us the word of reconciliation." For the same end for which Christ came, for the same did these take possession of the world. In this place again the "as" is not put to signify resemblance in the case of Himself and the Apostles; for how was it possible for men to be sent otherwise? But it was His custom to speak of the future as having come to pass.

But now He still goes on to speak of the apostles, for He proceeds to add, "As Thou hast sent me into the world, even so have I also sent them into the world." Whom did He so send but His apostles? For even the very name of apostles, which is a Greek word, signifies in Latin nothing more than, those that are sent. God, therefore, sent His Son, not in sinful flesh, but in the likeness of sinful flesh; and His Son sent those who, born themselves in sinful flesh, were sanctified by Him from the defilement of sin.

As Thou hast sent Me into the world, even so have I also sent them into the world. For what Christ was sent into the world, for the same end were they; as saith Paul, God was in Christ reconciling the world unto Himself; and hath given to us the word of reconciliation. (2 cor. 5:19) As does not express perfect likeness between our Lord and His Apostles, but only as much as was possible in men. Have sent them, He says, according to His custom of putting the past for the future.