12 Therefore let us now briefly run over what remains, and do you see how the Lord makes known to us the things which I have been here commending to your attention. “The Father loves the Son, and shows Him all things which Himself does.” Himself raises up souls, but by the Son, that the souls raised up may enjoy the substance of God, that is, of the Father and of the Son. “And greater works than these He will show Him.” Greater than which? Than healings of bodies. We have treated of this already, and must not linger upon it now.
Greater is the resurrection of the body unto eternity than this healing of the body, wrought in that impotent man, to last only for a time. “And greater works than these He will show Him, that you may marvel.” “Will show,” as if the act were temporal, therefore as to a man made in time, since God the Word is not made, He by whom all times were made. But Christ was made man in time. We know in what consulship the Virgin Mary brought forth Christ, conceived of the Holy Ghost. Wherefore He, by whom as God the times were made, was made man in time. Hence, just as in time, “He will show Him greater works,” that is, the resurrection of bodies, “that you may marvel” at the resurrection of bodies wrought by the Son.
Source: Tractates on the Gospel of John (New Advent)