John 6:39

I should lose nothing - It is the will of God that every soul who believes should continue in the faith, and have a resurrection unto life eternal. But he wills this continuance in salvation, without purposing to force the persons so to continue. God may will a thing to be, without willing that it shall be. Judas was given to Christ by the Father, John 17:12. The Father willed that this Judas should continue in the faith, and have a resurrection unto life eternal: but Judas sinned and perished. Now it is evident that God willed that Judas might be saved, without willing that he must be saved infallibly and unconditionally. When a man is a worker together with the grace of God, he is saved; when he receives that grace of God in vain, he is lost - not through a lack of will or mercy in God, but through lack of his co-operation with Divine grace. God saves no man as a stock or a stone, but as a reasonable being and free agent. "That which thou hast heard, thou mayest hold fast, and persevere in, if thou wilt," Says St. Augustin. In eo quod audieras, et tenueras, perseverares, si velles. De Correct. & Grat. c. 7. See Calmet.

Raise it up again at the last day - The Jews believed that the wicked should have no resurrection; and that the principle that led to the resurrection of the body, in the righteous, was the indwelling Spirit of God. This is positively asserted in the Shir Hashirim Rabba. See Schoettgen.

Father's will - His purpose; desire; intention. As this is the Father's will, and Jesus came to execute his will, we have the highest security that it will be done. God's will is always right, and he has power to execute it. Jesus was always faithful, and all power was given to him in heaven and on earth, and he will therefore most certainly accomplish the will of God.

Of all which - That is, of every one who believes on him, or of all who become Christians. See John 6:37.

I should lose nothing - Literally, "I should not destroy." He affirms here that he will keep it to life eternal; that, thought the Christian will die, and his body return to corruption, yet he will not be destroyed. The Redeemer will watch over him, though in his grave, and keep him to the resurrection of the just. This is affirmed of all who are given to him by the Father; or, as in the next verse, "Everyone that believeth on him shall have everlasting life."

At the last day - At the day of judgment. The Jews supposed that the righteous would be raised up at the appearing of the Messiah. See Lightfoot. Jesus directs them to a future resurrection, and declares to them that they will be raised at the last day - the day of judgment. It is also supposed and affirmed by some Jewish writers that they did not believe that the wicked would be raised. Hence, to speak of being raised up in the last day was the same as to say that one was righteous, or it was spoken of as the special privilege of the righteous. In accordance with this, Paul says, "If by any means I might attain unto the resurrection of the dead," Philippians 3:11.

6:39 Of all which he hath already given me - See John 17:6 ,12.If they endure to the end. But Judas did not.