Hilary of Poitiers
Catena Aurea · Johannesevangelium 17
These words spake Jesus, and lifted up his eyes to heaven, and said, Father, the hour is come; glorify thy Son, that thy Son also may glorify thee: As thou hast given him power over all flesh, that he should give eternal life to as many as thou hast given him. And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent. I have glorified thee on the earth: I have finished the work which thou gavest me to do. And now, O Father, glorify thou me with thine own self with the glory which I had with thee before the world was.
(iii. de Tr. c. 14) And in what eternal life is, He then shews: And this is life eternal, that they might know Thee, the only true God. To know the only true God is life, but this alone does not constitute life. What else then is added? And Jesus Christ whom Thou hast sent.