How do we know the sufficiency of Christ's work is true?

The sufficiency of Christ's work is established in the fact that it met all of God's demands for justice and righteousness. Hebrews 10 teaches that Christ made a once-for-all sacrifice, effectively atoning for the sins of His people. This means that He satisfied divine justice completely, leaving nothing more for sinners to do in order to achieve reconciliation with God. The biblical narrative emphasizes that salvation is solely dependent on Christ's completed work, declaring that believers are justified freely by His grace. The doctrine asserts that through Him, believers are declared righteous and are granted eternal life, ensuring that His work is entirely sufficient.