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, whereby they are spiritually and mystically, yet really and inseparably, joined to Christ as their head and husband; which is done in their effectual calling.
Q. 67. What is effectual calling?
A. Effectual calling is the work of God’s almighty power and grace, whereby (out of his free and special love to his elect, and from nothing in them moving him thereunto) he doth, in his accepted time, invite and draw them to Jesus Christ, by his Word and Spirit; savingly enlightening their minds, renewing and powerfully determining their wills, so as they (although in themselves dead in sin) are hereby made willing and able freely to answer his call, and to accept and embrace the grace offered and conveyed therein.
Q. 68. Are the elect only effectually called?
A. All the elect, and they only, are effectually called: although others may be, and often are, outwardly called by the ministry of the Word, and have some common operations of the Spirit; who, for their wilful neglect and contempt of the grace offered to them, being justly left in their unbelief, do never truly come to Jesus Christ.
Q. 69. What is the communion in grace which the members of the invisible church have with Christ?
A. The communion in grace which the members of the invisible church have with Christ, is their partaking of the virtue of his mediation, in their justification, adoption, sanctification, and whatever else, in this life, manifests their union with him.