Augustine of Hippo — as excerpted in the Catena Aurea on John 15:8-11

“(Tract. lxxxii. 1) Made bright or glorified; the Greek word may be translated in either way. Δόξα signifies glory; not our own glory, we must remember, as if we had it of ourselves: it is of His grace that we have it; and therefore it is not our own but His glory. For from whom shall we derive our fruitfulness, but from His mercy preventing us. Wherefore He adds, As My Father hath loved Me, even so love I you. This then is the source of our good works. Our good works proceed from faith which worketh by love: but we could not love unless we were loved first: As My Father hath loved Me, even so love I you. This does not prove that our nature is equal to His, as His is to the Father’s, but the grace, whereby He is the Mediator between God and man, the man Christ Jesus. The Father loves us, but in Him.”