3 From the very outset, therefore, of His prayer, when “He lifted up His eyes to heaven, and said, Father, the hour has come; glorify Your Son, that Your Son also may glorify You,” on to what He said a little afterwards, “And now, O Father, glorify Thou me with Your own self with the glory which I had with You before the world was,” He wished all His disciples to be understood, to whom He makes the Father known, and thereby glorifies Him. For after saying, “That Your Son may glorify You,” He straightway showed how that was to be done, by adding, “As You have given Him power over all flesh, that He should give eternal life to as many as You have given Him: and this is life eternal, that they might know You the only true God, and Jesus Christ, whom You have sent.”
For the Father cannot be glorified through any knowledge attained by men, unless He also be known by whom He is glorified, that is to say, by whom He is made known to the nations of the world. The glorification of the Father is not that which was displayed in connection with the apostles only, but that which is displayed in all men, of whom as His members Christ is the head. For the words cannot be understood as applied to the apostles only, “As You have given Him power over all flesh, that He should give eternal life to as many as You have given Him;” but to all, assuredly, on whom, as believing on Him, eternal life is bestowed.
Source: Tractates on the Gospel of John (New Advent)