Heidelberg Catechism, Lord's Day 52
Lord's Day 52 of the Heidelberg Catechism addresses the believer's assurance of salvation and the Christian's thankful response to God's grace. This catechetical instruction emphasizes both the forensic declaration of righteousness in Christ and the practical outworking of holiness in the Christian life, making it essential for understanding Reformed pedagogy and piety.
[Lord's Day 52 text - parse manually from https://www.crcna.org/welcome/beliefs/confessions/heidelberg-catechism]