6. The believer would act faith on Christ, as the head of the body, and as the stock in which the branches are ingrafted, and thereby suck sap, and life, and strength from him, that he may work, walk, and grow, as becometh a Christian. The believer must grow up in him, being a branch in him, and must bring forth fruit in him, as the forementioned places clear. Now, Christ himself tells us, that the branches cannot bring forth fruit, except they abide in the vine; and that no more can his disciples bring forth, except they abide in him, John xv. Therefore, as it is by faith that the soul, as a branch, is united to Christ, as the vine; and as it is by faith that they abide in him; so it is by faith that they must bring forth fruit; and this faith must grip Christ as the vine, and the stock or root from which cometh sap, life, and strength. Faith, then, must look to Christ as the fountain of furniture--as the head from whence cometh all the influences of strength and motion. Christ hath strength and life enough to give out, for "the fulness of the Godhead dwelleth in him bodily;" and he is also willing enough to communicate of his fulness, as the relations he hath taken on do witness. The head will not grudge to give to the members of the body, spirits for action and motion; nor will a vine grudge to give sap into the branches. Nay, life, strength, and furniture will, as it were, natively flow out of Christ unto believers, except they, through unbelief, and other distempers, cause obstructions; as life and sap doth natively and kindly flow from the root to the branches, or from the head to the members, unless obstructions stop the passage. It is necessary, therefore, that believers eye Christ under these and the like relations, and look upon him as standing, (so to speak,) obliged by his place and relation, to grant strength and influences of life, whereby they may become fruitful in every good work; and so with holy, humble, and allowed boldness, press in faith for new communications of grace, virtue, strength, courage, activity, and what else they need; for, from the head, all the body, by joints and bands, having nourishment ministered, increaseth with the increase of God. Col. ii. 19. Eph. iv. 16.