Why is mortification of sin important for Christians?

Mortification, or the active suppression of sin, is an essential aspect of the Christian life. Paul commands believers in Colossians 3:5 to mortify their members upon the earth, which refers to actively resisting sin and its influence. This process is necessary because, although believers have died to sin in their position before God, they continue to struggle with their old nature. Engaging in mortification lays the groundwork for sanctification, allowing the new man in Christ to flourish. It reflects a believer's dependence on God’s grace to overcome temptation and pursue holiness. As they resist sin, they grow in their understanding of God's character and become more like Christ.