Westminster Larger Catechism – Lord’s Day 18
Q & A 66
Q 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 *1, whereby they are spiritually and mystically, yet really and inseparably, joined to Christ as their head and husband *2; which is done in their effectual calling *3.
Q & A 67
Q What is effectual calling?
A Effectual calling is the work of God’s almighty power and grace *4, whereby (out of his free and special love to his elect, and from nothing in them moving him thereunto) *5 he doth, in his accepted time, invite and draw them to Jesus Christ, by his Word and Spirit *6; savingly enlightening their minds *7, renewing and powerfully determining their wills *8, 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 *9.
Q & A 68
Q Are the elect only effectually called?
A All the elect, and they only, are effectually called: *10 although others may be, and often are, outwardly called by the ministry of the Word *11, and have some common operations of the Spirit *12; 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 *13.
Q & A 69
Q 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,14 adoption *15, sanctification, and whatever else, in this life, manifests their union with him *16.
*1 Ephesians 1:22; Ephesians 2:6-7.
*2 1 Corinthians 6:17; John 10:28; Ephesians 5:23, 30.
*3 1 Peter 5:10; 1 Corinthians 1:9.
*4 John 5:25; Ephesians 1:18-20; 2 Timothy 1:8-9.
*5 Titus 3:4-5; Ephesians 2:4-5, 7-9; Romans 9:11.
*6 2 Corinthians 5:20; 2 Corinthians 6:1-2; John 6:44; 2 Thessalonians 2:13-14.
*7 Acts 26:18; 1 Corinthians 2:10, 12.
*8 Ezekiel 11:19; Ezekiel 36:26-27; John 6:45.
*9 Ephesians 2:5; Philippians 2:13; Deuteronomy 30:6.
*10 Acts 13:48.
*11 Matthew 22:14.
*12 Matthew 7:2; Hebrews 6:4-6.
*13 John 12:38-40; Acts 28:25-27; John 6:64-65; Psalm 81:11-12.
*14 Romans 8:30.
*15 Ephesians 1:5.
*16 1 Corinthians 1:30.