Why is Christ's atonement important for salvation?

The atonement of Christ is crucial for salvation as it addresses the justice of God against sin. In Romans 3:25, it is stated that God presented Christ as a sacrifice of atonement through the shedding of His blood to be received by faith. This means that Christ bore the wrath of God that was due to sinners, extinguishing it completely. His atonement was not just a mere sacrifice; it was a perfect and complete act that met every requirement of God's law on behalf of His people. Thus, through Christ, believers are justified and reconciled to God, as seen in 2 Corinthians 5:21, which declares that God made Him who had no sin to be sin for us, so that in Him we might become the righteousness of God.