How do we know Jesus' atonement is sufficient for our salvation?

The sufficiency of Christ’s atonement is rooted in His perfect obedience and the completeness of His sacrifice. The Scriptures affirm that Jesus is the perfect mediator who entered heaven as our representative. He did not lower God’s standard of righteousness but fulfilled it in its entirety on our behalf. Colossians 2:14 states that He canceled out our debt by nailing it to the cross, indicating that what He accomplished is utterly sufficient for our salvation. This assurance in His finished work gives believers confident access to God.