Why is it important for Christians to rest in what Christ has done?

For Christians, resting in what Christ has done is vital because it provides true peace and assurance in their relationship with God. When one relies on their works for salvation, it leads to uncertainty and anxiety about meeting the necessary standards. In contrast, understanding that Christ's sacrificial death has completed the work of redemption allows believers to experience rest in their faith. Romans 4:5 states that God justifies the ungodly based on faith, not works. This knowledge enables Christians to embrace their identity in Christ, relying fully on His righteousness rather than their failures.