How do we know Christ's work of redemption is sufficient?

Christ's work of redemption is sufficient due to several evidences pointed out in Scripture. Notably, Hebrews 10:18 states that where remission of sin is, there is no more offering for sin, highlighting that Christ's singular sacrifice is fully sufficient. Furthermore, the empty tomb signifies that God's justice was satisfied. When He ascended into heaven and sat down at the right hand of God, it indicated His completed work and God's acceptance of His sacrifice, affirming that salvation is accomplished and not merely a possibility for those who believe.