Why is the atonement through Jesus Christ important for Christians?

The significance of Jesus Christ's atonement cannot be overstated. Hebrews 1:3 indicates that 'when He had by Himself purged our sins,' the work of redemption was complete. This emphasizes that Christ's sacrifice was sufficient and comprehensive, offering eternal redemption. Other sacrifices under the Old Covenant could never take away sins, but Christ's single, perfect sacrifice fulfills the law's requirements and secures forgiveness for His people. The assurance of no condemnation for those in Christ (Romans 8:1) flows directly from this atoning work, solidifying our relationship with God and offering us peace and acceptance before Him.