Why is understanding Christ's atonement important for Christians?

Understanding the atonement of Christ is essential for Christians as it establishes the foundation of their faith. Hebrews 10:14 states, "For by one offering he hath perfected forever them that are sanctified," demonstrating that those for whom Christ died are not just pardoned but perfected in God's sight through His sacrifice. This assurance allows believers to rest in the reality of their reconciliation with God and frees them from the bondage of trying to earn righteousness through the law. It solidifies the grasp of God’s grace, which is central to the Reformed understanding of salvation.