AS CHRIST DIED, our old man died with Him, TOO, for it died in His death.
The ignorance of this fact explains the failure of many.
Believers tend to use their own power to Crucify the old man.
Yet however much they may try, that old man is still alive, because it is absolutely impossible for them individually to Crucify the old man outside of Christ.
Most Believers do this through ignorance.
They do not know that apart from dying with Christ, there is no other way to put the old man to death.
The old man is to be Crucified with Christ.