All saints, that are united to Jesus Christ their Head, by his Spirit, and by faith, have fellowship with him in his graces, sufferings, death, resurrection, and glory:1 and, being united to one another in love, they have communion in each other’s gifts and graces,2 and are obliged to the performance of such duties, public and private, as do conduce to their mutual good, both in the inward and outward man.3
Q 66. What is that union which the elect have with Christ?
A. The union which the elect have with Christ is the work of God’s grace,4 whereby they are spiritually and mystically, yet really and inseparably, joined to Christ as their head and husband;5 which is done in their effectual calling.6