John 15:8

"Ye shall ask what ye will, and it shall be done unto you." This He said to show that they who plotted against Him should be burnt up, but that they should bear fruit. Then transferring the fear from them to the others, and showing that they should be invincible, He saith, "Herein is My Father glorified, that ye be My disciples, and bear much fruit." Hence He maketh His discourse credible, for if the bearing fruit pertains to the glory of the Father, He will not neglect His own glory. "And ye shall be My disciples." Seest thou how he that beareth fruit, he is the disciple? But what is, "In this is the Father glorified"? "He rejoiceth when ye abide in Me, when ye bear fruit."

(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. (Tract. lxxxii. 3. et seq.) Who doubts that love precedes the observance of the commandments? For who loves not, has not that whereby to keep the commandments. These words then do not declare whence love arises, but how it is shown, that no one might deceive himself into thinking that he loved our Lord, when he did not keep His commandments. Though the words, Continue ye in My love, do not of themselves make it evident which love He means, ours to Him, or His to us, yet the preceding words do: I love you, He says: and then immediately after, Continue ye in My love. Continue ye in My love, then, is, continue in My grace: and, If ye keep My commandments, ye shall abide in My love, is, Your keeping of My commandments, will be evidence to you that ye abide in My love. It is not that we keep His commandments first, and that then He loves; but that He loves us, and then we keep His commandments. This is that grace, which is revealed to the humble, but hidden from the proud. But what means the next words, Even as I have kept My Father's commandments, and abide in His love: i. e. the Father's love, wherewith He loveth the Son. Must this grace, wherewith the Father loves the Son, be understood to be like the grace wherewith the Son loveth us? No; for whereas we are sons not by nature, but by grace, the Only Begotten is Son not by grace, but by nature. We must understand this then to refer to the manhood in the Son, even as the words themselves imply: As My Father hath loved Me, even so love I you. The grace of a Mediator is expressed here; and Christ is Mediator between God and man, not as God, but as man. This then we may say, that since human nature does not pertain to the nature of God, but does by grace pertain to the Person of the Son, grace also pertains to that Person; such grace as has nothing superior, nothing equal to it. For no merits on man's part preceded the assumption of that nature.

The Saviour, in thus speaking to the disciples, commends still more and more the grace whereby we are saved, when He says, "Herein is my Father glorified, that ye bear very much fruit, and be made my disciples." Whether we say glorified, or made bright, both are the rendering given us of one Greek verb, namely doxazein. For what is doxa in Greek, is in Latin glory. I have thought it worth while to mention this, because the apostle says, "If Abraham was justified by works, he hath glory, but not before God." For this is the glory before God, whereby God, and not man, is glorified, when he is justified, not by works, but by faith, so that even his doing well is imparted to him by God; just as the branch, as I have stated above, cannot bear fruit of itself. For if herein God the Father is glorified, that we bear much fruit, and be made the disciples of Christ, let us not credit our own glory therewith, as if we had it of ourselves. For of Him is such a grace, and accordingly therein the glory is not ours, but His. Hence also, in another passage, after saying, "Let your light so shine before men that they may see your good works;" to keep them from the thought that such good works were of themselves, He immediately added, "and may glorify your Father who is in heaven." For herein is the Father glorified, that we bear much fruit, and be made the disciples of Christ. And by whom are we so made, but by Him whose mercy hath forestalled us? For we are His workmanship, created in Christ Jesus unto good works.

The fruit of the Apostles are the Gentiles, who through their teaching were converted to the faith, and brought into subjection to the glory of God.