How do we know that the doctrine of atonement is true?

The doctrine of atonement asserts that Christ’s sacrifice through His blood is essential for salvation. Romans 5:9 states, 'We are justified by His blood.' This doctrine is affirmed throughout Scripture, particularly in passages that illustrate how sin necessitates a blood sacrifice for redemption. Furthermore, the consistency of this theme from the Old Testament sacrificial system to Christ's fulfillment of the law reinforces its truth. The blood of Christ speaks a better word than the blood of Abel, emphasizing both God’s justice and His grace, confirming the atonement as a cornerstone of the Christian faith.