(4) Abide in me, and I in you.--The clauses are here connected as cause and effect. The second is the promise, which will not fail if the command of the first be observed. The union then, and all that follows from it, is placed within the power of the human will. All is contained in the words, "Abide in Me." He who obeys this command has Christ abiding in him, and is a fruitful branch of the true vine.

As the branch cannot bear fruit of itself.--The branch regarded of itself, apart from ("except it abide in") the vine, has no original source of life. The sap flows from the vine to branch and tendril and leaf and fruit. The branch of itself is a lifeless organ, and only fulfils its functions when it is connected with the vine. So in the spiritual life, men apart from Christ have no original source of life and fruitfulness. The true life flows from Him to every branch that abides in Him, quickening by its power the whole man, and making him fruitful in good. The man who lives without faith in God may be said to exist, rather than to live, and misses the true aim of his being.

Verse 4. - But there is a continuance of most intimate relations to be sustained between Christ and his disciples. If the two clauses are "imperative," or rather concessive, as many suppose, the finest meaning is evolved. Let these be the reciprocal conditions, let it be that you abide in me, and I in you. (Meyer and Lange add to the second clause μενῶ, "I will abide in you," making it into a promise following a command, and involving a very strong synergistic thought.) There is a mutual abiding or indwelling. The life-principle circulates through the branches, just as they perpetuate the living connection between the branch and the center of the life. The mutual relations show that human nature is in infinite need, and, apart from the new life-principle, will perish. The abiding of the branch in the vine suggests the continuance of vital connection' with the living stem, and supposes that connection kept up by constant faith, so that the believer is in a position to draw life from the legitimate source. The abiding of the vine in the branch - "I in you" -is the perpetual inflow into the subordinate life, of the living grace which makes the believer's life one with his Lord's. As he said (John 14:19), "Because I live, and ye shall live;" so now, As the branch cannot bear fruit from itself - from its own inherent vitality - except it abide in the vine - except this connection is maintained - in like manner no more (or, so neither) can ye, except ye abide in me. The affirmation does not cover, as Augustine implies (although it may suggest), the impotence of the natural man, but it asserts the unfruitfulness of the disciple in his own strength. Some have found here revindication of the place of the human will in the work of grace. Let it be seen, however, that it is the "good will," the new nature, which has been wakened into normal activity, and which wills the thing most pleasing to the Divine Source of the life.

15:1-8 Jesus Christ is the Vine, the true Vine. The union of the human and Divine natures, and the fulness of the Spirit that is in him, resemble the root of the vine made fruitful by the moisture from a rich soil. Believers are branches of this Vine. The root is unseen, and our life is hid with Christ; the root bears the tree, diffuses sap to it, and in Christ are all supports and supplies. The branches of the vine are many, yet, meeting in the root, are all but one vine; thus all true Christians, though in place and opinion distant from each other, meet in Christ. Believers, like the branches of the vine, are weak, and unable to stand but as they are borne up. The Father is the Husbandman. Never was any husbandman so wise, so watchful, about his vineyard, as God is about his church, which therefore must prosper. We must be fruitful. From a vine we look for grapes, and from a Christian we look for a Christian temper, disposition, and life. We must honour God, and do good; this is bearing fruit. The unfruitful are taken away. And even fruitful branches need pruning; for the best have notions, passions, and humours, that require to be taken away, which Christ has promised to forward the sanctification of believers, they will be thankful, for them. The word of Christ is spoken to all believers; and there is a cleansing virtue in that word, as it works grace, and works out corruption. And the more fruit we bring forth, the more we abound in what is good, the more our Lord is glorified. In order to fruitfulness, we must abide in Christ, must have union with him by faith. It is the great concern of all Christ's disciples, constantly to keep up dependence upon Christ, and communion with him. True Christians find by experience, that any interruption in the exercise of their faith, causes holy affections to decline, their corruptions to revive, and their comforts to droop. Those who abide not in Christ, though they may flourish for awhile in outward profession, yet come to nothing. The fire is the fittest place for withered branches; they are good for nothing else. Let us seek to live more simply on the fulness of Christ, and to grow more fruitful in every good word and work, so may our joy in Him and in his salvation be full.Abide in me, and I in you,.... The former of these is an exhortation to continue in the exercise of faith and love upon Christ, holding to him the head, cleaving to him with full purpose of heart, and so deriving life, grace, strength, and nourishment from him; the latter is a promise encouraging to the former; for as Christ is formed in the hearts of his people, he continues there as the living principle of all grace. And so,

as the branch cannot bear fruit of itself, except it abide in the vine, no more can ye, except ye abide in me; which strongly expresses the necessity of abiding in Christ by fresh repeated acts of faith: and it is easy to observe, that when believers depart from Christ, though it be but partially, and for a time, for they cannot finally and totally depart from him, in what a poor, withered, fruitless condition they are, both in their frames and duties.