John 15:4

(2.) The necessity of our abiding in Christ, in order to our fruitfulness (v. 4, 5): "You cannot bring forth fruit, except you abide in me; but, if you do, you bring forth much fruit; for, in short, without me, or separate from me, you can do nothing." So necessary is it to our comfort and happiness that we be fruitful, that the best argument to engage us to abide in Christ is, that otherwise we cannot be fruitful. [1.] Abiding in Christ is necessary in order to our doing much good. He that is constant in the exercise of faith in Christ and love to him, that lives upon his promises and is led by his Spirit, bringeth forth much fruit, he is very serviceable to God's glory, and his own account in the great day. Note, Union with Christ is a noble principle, productive of all good. A life of faith in the Son of God is incomparably the most excellent life a man can live in this world; it is regular and even, pure and heavenly; it is useful and comfortable, and all that answers the end of life. [2.] It is necessary to our doing any good. It is not only a means of cultivating ad increasing what good there is already in us, but it is the root and spring of all good: "Without me you can do nothing: not only no great thing, heal the sick, or raise the dead, but nothing." Note, We have as necessary and constant a dependence upon the grace of the Mediator for all the actions of the spiritual and divine life as we have upon the providence of the Creator for all the actions of the natural life; for, as to both, it is in the divine power that we live, move, and have our being. Abstracted from the merit of Christ, we can do nothing towards our justification; and from the Spirit of Christ nothing towards our sanctification. Without Christ we can do nothing aright, nothing that will be fruit pleasing to God or profitable to ourselves, 2 Cor 3 5. We depend upon Christ, not only as the vine upon the wall, for support; but, as the branch on the root, for sap.

Verses 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…