All men would desire to have privileges beyond others, but there is one that carries it away from all the world, and that is the believer in Jesus Christ, who is said to be in Christ, implanted in him by faith, as a lively member of that body whereof Christ is the head. Christ Jesus is the head of that body, the church; and this head communicates life unto all the members, for “he filleth all in all.” There is a mighty working power in the head, which diffuseth itself throughout the members, Eph. i. 19, 22, 23. There are many expressions of union between Christ and believers. There is no near conjunction among men, but this spiritual union of Christ with believers is represented to us under it. The foundation and the building have a near dependence, the corner-stone and the wall—these knit together; and Christ Jesus is the foundation and “the chief corner-stone, in whom all the building fitly framed together, groweth unto an holy temple,” Eph. ii. 20, 21. The head and members are near united, so is Christ and believers; they “grow up into him,” Eph. iv. 15. Parents and children are almost one, so is Christ Jesus the everlasting Father, and he shows to the Father the children which he hath given him. We are his brethren, and he is not ashamed to call us so; but which is more, we are one flesh with him. There is a marriage between Christ and the church, and this is the great meditation of the song of Solomon. He is the vine tree, and we are branches planted in him. Nay, this union is so strict, that it is mutual, “I in them,” and they “in me.” Christ dwelleth in us by faith, by making us to believe in him, and love him; we dwell in Christ by that same faith and love, by believing in him, and loving him. Christ Jesus is our house where we get all our furniture; he is our store-house and treasure, our place of strength and pleasure, a city of refuge, a strong tower and a pleasant river to refresh us. We again are his habitation where he dwelleth by his Spirit; we are his workhouse, where he works all his curious pieces of the new creature, forming it unto the day of his espousals, the great day of redemption.