Who ever questions the reality of the crucufixtion of Christ? Why then, should we doubt the reality of the crucifixtion of the old man? Christians try their best to crucify themselves. They not only do this to themselves, they teach others to do so as well.
This is grievous misjudgment. The Bible never instructs us to crucify ourselves. When Christ went to Calvary He took us there and had us crucified. We are not instructed to start crucifying ourselves now.
We are “in Christ” and are united with Him.
When a truth is unfolded by God it most naturally become a power in man, and finds himself able to believe. Faith comes through revelation and without revelation there can be no faith.