Why is the concept of atonement important for Christians?

The concept of atonement holds immense importance for Christians because it signifies the foundation of our faith in reconciling sinners to a holy God. Atonement reveals God's justice and mercy coexisting in His plan of salvation, as described in Isaiah 53, where the suffering servant bears our sins. The Day of Atonement foreshadows the ultimate atonement achieved by Christ, who was made sin for us so that we might become the righteousness of God. Through this process, believers understand their standing before God is based on Christ's righteousness and not their works. The ongoing need for atonement in Christian life encourages believers to rely on Christ, recognizing the severity of sin and the grace that has been extended to them, encouraging a life of gratitude, worship, and holiness.