John 14:15–20

Verse 15. Instead of afflicting yourselves at our separation, and my going to the Father, you ought, if you truly love me, to testify your affection, by a faithful observance of my commandments. Behold, this is the best proof you can give me of your attachment: better far than any exterior sign of grief and tenderness. Saint John Chrysostom

Verse 16. Paraclete. This is a comforter: or also an advocate: inasmuch as by inspiring prayer, he prays, as it were, in us, and pleads for us.—For ever. Hence it is evident, that this spirit of truth was not only promised to the persons of the apostles, but also to their successors, through all generations. Challoner.—I have not changed the word Paraclete, which signifies, both and advocate and a comforter. He shall remain with you, and in you, for ever. What greater happiness, what greater security for the faithful, than to have this divine promise, the Holy Ghost, the Spirit of truth, remaining with the Church for ever, to protect her, and preserve her from all errors and heresies? Witham.—If the Holy Ghost had been promised only to the apostles, their successors could not have challenged the promise. But the promises and privileges were not merely personal, but attached to their office perpetually. Hence, the Holy Ghost, in every age and clime, perpetually watches over the Catholic Church, and preserves her from both open and secret attacks of her enemies.

Greek παρακλητον: Counselor, Helper, Intercessor, Advocate, and Comforter.

Verse 19. The world seeth me no more, after my death; but you shall see me, conversing with you for forty days, after my resurrection. Witham.

Verse 20. In that day, when I am risen again, or when the Holy Ghost is come, you shall know that I am in the Father, and how, and in what manner: as also, how I am in you, and you in me. Our Saviour Christ, on several occasions, speaks of different ways of being united, or of being one; as first, of being one in nature and substance, and by such an union, as agrees only with the divine persons, who are one in all things. 2dly, Persons may be one, or united in affection and love, which also, as to its most perfect manner, agrees only with the three divine persons; but a similitude, and an imitation of this union of love, is found among creatures, both when they love God, and when for God’s sake, they love one another: yet these unions are as different as God, and his creatures. The Arians and Socinians lay hold on these expressions, and of the words, (chapter 17 verse 21) when Christ prays, that his disciples may be one, as he and his Father are one, which words imply no more than a similitude, and an imitation of that union of love (with which the three divine persons love one another) though at an infinite distance. If the old or new Arians examined, with a sincere desire of finding the truth (which they ought to seek from many passages in the New Testament, as well as from the sense and tradition of the Church, guided by the promised Spirit of Truth) they might certainly find how different is the union of nature and substance of the eternal Son with his eternal Father, and of that union of the three divine persons, when they are said to be one, from that inferior and lesser union of love and affection, by which either God loves his adoptive children, his faithful servants, or they love one another: they would easily discover, that many things are said of the unity and union of the divine persons, which could not be true, unless they were one and the same God, coeternal and consubstantial, which by no means can be said of God and his creatures, nor of the union of affection only, by which the creatures love one another. Witham.