How do we know the doctrine of Christ's sacrifice is true?

The doctrine of Christ’s sacrifice is grounded deeply in Scripture and is affirmed by numerous prophecies throughout the Old Testament. For example, in Isaiah 53, we see a vivid foretelling of the suffering servant who bears the iniquities of many. The New Testament explicitly presents Christ’s death as a fulfillment of these prophetic images, declaring in Hebrews 10:14 that 'by one sacrifice he has made perfect forever those who are being made holy.' This doctrine is not only a historical claim but is also evidenced through the transformative lives of believers who experience the power of the Gospel. Faith in Christ results in a new creation (2 Corinthians 5:17) and the assurance of salvation based on His atoning work alone.