Heidelberg Catechism, Lord's Day 21

Lord's Day 21 of the Heidelberg Catechism addresses the believer's gratitude and sanctification in response to redemption in Christ, presenting a practical exposition of Christian living rooted in justification. This catechetical material serves as a foundational teaching resource for understanding how the doctrine of salvation translates into daily obedience and spiritual growth. As a confessional document, it reflects the Reformed principle of instructing both children and adults in the essential truths of the faith.