Pastor walks his children through Children's Catechism question 51—especially explaining how God gives a new heart that loves and does holiness. Q51. What is sanctification? It is God's making sinners holy in heart and conduct. Sanctification is God's ongoing work of making believers holy in both heart and conduct through union with Christ. Besides both positional sanctification, and covenantal sanctification, it is especially the transformative process whereby believers, renewed by grace, grow increasingly dead to sin and alive to righteousness.