How do we know that our old nature will be eradicated?

Romans 6:6 clearly states that our old man is crucified with Christ so that the body of sin might be destroyed. This promise reassures us that the power of sin, represented by Esau, is broken for those who are in Christ. By faith, we acknowledge this reality, understanding that while the struggle against the flesh persists, the final victory over that old nature is assured in Christ's redemptive work. In His resurrection, we find the hope that we, too, shall be made alive unto God, free from sin's domination.