17 Let Him declare this more distinctly, that the heretical denier of the resurrection of the body may not find a pretext for sophistical cavil, although the meaning already shines out clearly. When it was said above, “The hour is coming,” He added, “and now is;” but just now, “The hour is coming,” He has not added, “and now is.” Let Him, however, by the open truth, burst asunder all handles, all loops and pegs of sophistical attack, all the nooses of ensnaring objections. “Marvel not at this: for the hour is coming, in which all that are in the graves.” What more evident? What more distinct? Bodies are in the graves; souls are not in the graves, either of just or of unjust. The soul of the just man was in the bosom of Abraham; the unjust man's soul was in hell, tormented: neither the one nor the other was in the grave. Above, when He says, “The hour is coming, and now is,” I beseech you give earnest heed. You know, brethren, that we get the bread of the belly with toil; with how much greater toil the bread of the mind! With labor you stand and hear, but with greater we stand and speak. If we labor for your sake, you ought to labor with us for your own sake. Above, then, when He said, “The hour is coming,” and added, “and now is,” what did He subjoin? “When the dead shall hear the voice of the Son of God, and they that hear shall live.” He did not say, “All the dead shall hear, and they that hear shall live;” for He meant the unrighteous to be understood. And is it so, that all the unrighteous obey the gospel? The apostle says openly, “But not all obey the gospel.” But they that hear shall live, because all that obey the gospel shall pass to eternal life by faith: yet all do not obey; and this is now. But certainly, in the end, “All that are in the graves,” both the just and the unjust, “shall hear His voice, and come forth.” How is it He would not say, “and shall live”? All, indeed, will come forth, but all will not live. For in that which He said above, “And they that hear shall live,” He meant it to be understood that there is in that very hearing and obeying an eternal and blessed life, which not all that shall come forth from the graves will have. Here, then, both in the mention of graves, and by the expression of a “coming forth” from the graves, we openly understand a resurrection of bodies.
18. “All shall hear His voice, and shall come forth.” And where is judgment, if all shall hear and all shall come forth? It is as if all were confusion; I see no distinguishing. Certainly You have received authority to judge, because You are the Son of man: behold, You will be present in the judgment; the bodies will rise again; but tell us something of the judgment itself, that is, of the separation of the evil and the good. Hear this further, then: “They that have done good into the resurrection of life; they that have done evil into the resurrection of judgment.” When above He spoke of a resurrection of minds and souls, did He make any distinction? No, for all “that hear shall live;” because by hearing, viz. by obeying, shall they live. But certainly not all will go to eternal life by rising and coming forth from the graves—only they that have done well; and they that have done ill, to judgment. For here He has put judgment for punishment. There will also be a separation, not such as there is now. For now we are separated, not by place, but by character, affections, desires, faith, hope, charity. Now we live together with the unjust, though the life of all is not the same: in secret we are distinguished, in secret we are separated; as grain on the floor, not as grain in the granary. On the floor, grain is both separated and mixed: separated, because severed from the chaff; mixed, because not yet winnowed. Then there will be an open separation; a distinguishing of life just as of the character, a separation as there is in wisdom, so also will there be in bodies. They that have done well will go to live with the angels of God; they that have done evil, to be tormented with the devil and his angels. And the form of a servant will pass away. For to this end He had manifested Himself, that He might execute judgment. After the judgment, He shall go hence, will lead with Him the body of which He is the head, and deliver up the kingdom of God. Then will openly be seen that form of God which could not be seen by the wicked, to whose vision the form of a servant must be shown. He says also in another place on this wise: “These shall go away into everlasting burning” (speaking of certain on the left), “but the just into life eternal;” of which life He says in another place: “And this is eternal life, that they may know You the one true God, and Jesus Christ whom You have sent.” Then will He be there manifested, “who, being in the form of God, thought it not robbery to be equal with God.” Then He will manifest Himself, as He has promised to manifest Himself to them that love Him. For “he that loves me,” says He, “keeps my commandments; and he that loves me shall be loved of my Father; and I will love him, and will manifest myself to him.” He was present in person with those to whom He was speaking: but they saw the form of a servant, they did not see the form of God. They were being led on His own beast to His dwelling to be healed; but now being healed, they will see, because, says He, “I will manifest myself to him.” How is He shown equal to the Father? When He says to Philip, “He that sees me sees my Father also.”
19. “I cannot of myself do anything: as I hear, I judge: and my judgment is just.” Else we might have said to Him, “You will judge, and the Father will not judge, for 'all judgment has He given to the Son.' it is not, therefore, according to the Father that You will judge.” Hence He added, “I cannot of myself do anything: as I hear, I judge: and my judgment is just; because I seek not my own will, but the will of Him that sent me.” Undoubtedly the Son quickens whom He will. He seeks not His own will, but the will of Him that sent Him. Not my own, my proper will; not mine, not the Son of man's; not mine to resist God. For men do their own will, not God's, when they do what they list, not what God commands; but when they do what they list, so as yet to follow God's will, they do not their own will, notwithstanding they do what they list to do. Do what you are bidden willingly, and thus shall you both do what you will, and also not do your own will, but His that bids.
Source: Tractates on the Gospel of John (New Advent)