Heidelberg Catechism, Lord's Day 39
Lord's Day 39 of the Heidelberg Catechism addresses the nature of Christian assurance and the believer's confidence in salvation through Christ. This catechetical instruction explores how justification and sanctification work together in the Christian life, making it essential for understanding Reformed teaching on the means of grace through catechism instruction and spiritual growth.
[Lord's Day 39 text - parse manually from https://www.crcna.org/welcome/beliefs/confessions/heidelberg-catechism]