If you love me. The love with which the disciples loved Christ was true and sincere, and yet there was some superstition mixed with it, as is frequently the case with ourselves; for it was very foolish in them to wish to keep him in the world. To correct this fault, he bids them direct their love to another end; and that is, to employ themselves in keeping the commandments which he had given them. This is undoubtedly a useful doctrine, for of those who think that they love Christ, there are very few who honor him as they ought to do; but, on the contrary, after having performed small and trivial services, they give themselves no farther concern. The true love of Christ, on the other hand, is regulated by the observation of his doctrine as the only rule. But we are likewise reminded how sinful our affections are, since even the love which we bear to Christ is not without fault, if it be not directed to a pure obedience.

If ye love me - Do not show your love by grief at my departure merely; or by profession, but by obedience.
Keep my commandments - This is the only proper evidence of love to Jesus, for mere profession is no proof of love; but that love for him which leads us to do all his will, to love each other, to deny ourselves, to take up our cross, and to follow him through evil report and through good report, is true attachment. The evidence which we have that a child loves its parents is when that child is willing, without hesitation, gainsaying, or complaining, to do all that the parent requires him to do. So the disciples of Christ are required to show that they are attached to him supremely by yielding to all his requirements, and by patiently doing his will in the face of ridicule and opposition, 1-John 5:2-3.

If ye love me, keep my commandments - Do not be afflicted at the thought of my being separated from you: the most solid proof ye can give of your attachment to and affection for me is to keep my commandments. This I shall receive as a greater proof of your affection than your tears.

(6) If ye love me, keep my commandments.
(6) He loves Christ rightly who obeys his commandment: and because obedience to Christ is accompanied with an infinite type and amount of miseries, although he is absent in body, yet he comforts his own with the present power of the Holy Spirit, whom the world despises, because it does not know him.

If ye love me,.... Not that Christ doubted of the love of his disciples to him; but he argues from it to their observance of his precepts, seeing ye do love me; as all do who are born again, who have had any spiritual sight of him, of his glory, suitableness, and fulness; who believe in him, and have received from him; who have had his love shed abroad in their hearts, having enjoyed communion with him, and know the relation he stands in to them; these love him above all others, and all of him, and that belong to him, unfeignedly, and in the sincerity of their souls, as did the disciples; and since they professed to love, and did love him, as they ought to do, he exhorts them, saying,
keep my commandments: Christ is Lord over his people, as he is the Creator and Redeemer of them, and as he is an head and husband to them, and as such he has a right to issue out his commands, and enjoin a regard unto them; and these are peculiarly "his", as distinct from, though not in opposition to, or to the exclusion of, his Father's commands; such as the new commandment of loving one another, and the ordinances of baptism, and the Lord's supper, which are to be observed and kept as Christ has ordered them, constantly, in faith, and with a view to his glory.

If ye love me, keep my commandments. And I will pray the Father, &c.--This connection seems designed to teach that the proper temple for the indwelling Spirit of Jesus is a heart filled with that love to Him which lives actively for Him, and so this was the fitting preparation for the promised gift.
he shall give you another Comforter--a word used only by John; in his Gospel with reference to the Holy Spirit, in his First Epistle (1-John 2:1), with reference to Christ Himself. Its proper sense is an "advocate," "patron," "helper." In this sense it is plainly meant of Christ (1-John 2:1), and in this sense it comprehends all the comfort as well as aid of the Spirit's work. The Spirit is here promised as One who would supply Christ's own place in His absence.
that he may abide with you for ever--never go away, as Jesus was going to do in the body.

If ye love me, keep my commandments. Keeping the commandments will be the result if we love him. The Revision gives the true idea. Obedience is the fruit of love.

If ye love me, keep my commandments - Immediately after faith he exhorts to love and good works.