How do we know that mortifying sin is essential for Christians?

The necessity of mortification—the act of putting to death sin in our lives—is clearly emphasized in Romans 8:13, where Paul states, 'If ye through the Spirit do mortify the deeds of the body, ye shall live.' This verse underscores the believer's calling to actively combat sin as part of their sanctification process. Through mortification, believers participate in the transformative work of the Holy Spirit, gaining strength and reliance on God's grace to overcome their sinful nature. It is a daily struggle to align oneself with God's holiness and righteousness.