How do we know that Jesus' atonement was sufficient?

The sufficiency of Jesus' atonement can be confirmed through His resurrection, which serves as God's validation of the sacrifice. According to Romans 4:25, Jesus was raised for our justification, indicating that His death was not only a martyrdom but a victorious moment in the divine plan of salvation. When He cried 'It is finished,' it signified that every requirement of the law had been met and that the debt was fully paid. This is reinforced by the fact that the veil of the temple was torn, symbolizing that access to God was opened for all who would come through faith in Christ.