8 “And there were certain Gentiles among them that had come up to worship at the feast: the same came therefore to Philip, who was of Bethsaida of Galilee, and desired him, saying, Sir, we would see Jesus. Philip comes and tells Andrew: and again Andrew and Philip tell Jesus.” Let us hearken to the Lord's reply. See how the Jews wish to kill Him, the Gentiles to see Him; and yet those, too, were of the Jews who cried, “Blessed is He that comes in the name of the Lord, the King of Israel.”
Here, then, were they of the circumcision and they of the uncircumcision, like two house walls running from different directions and meeting together with the kiss of peace, in the one faith of Christ. Let us listen, then, to the voice of the Cornerstone: “And Jesus answered them, saying, The hour has come that the Son of man should be glorified.” Perhaps some one supposes here that He spoke of Himself as glorified, because the Gentiles wished to see Him. Such is not the case.
But He saw the Gentiles themselves in all nations coming to the faith after His own passion and resurrection, because, as the apostle says, “Blindness in part has happened to Israel, until the fullness of the Gentiles should be come in.” Taking occasion, therefore, from those Gentiles who desired to see Him, He announces the future fullness of the Gentile nations, and promises the near approach of the hour when He should be glorified Himself, and when, on its consummation in heaven, the Gentile nations should be brought to the faith.
To this it is that the prediction pointed, “Be Thou exalted, O God, above the heavens, and Your glory above all the earth.” Such is the fullness of the Gentiles, of which the apostle says, “Blindness in part is happened to Israel, till the fullness of the Gentiles come in.”
Source: Tractates on the Gospel of John (New Advent)