I believe that every failure in the body of Christ comes down to a lack of identifying with Christ.
For example; His death was my death. (Romans 6:6-8, Col. 3:3) We were crucified with Him, etc. (Gal. 2:20, Romans 6:6) If this is the case, than my old man or old self is dead. If I do not understand this, I will fight a dead old man.
This is the reason that attempting to fix or modify one’s behavior does not produce lasting effects. Therefore, true humility is not thinking less of self; but none of self. Why? Because of being consumed in Jesus, Who has now become my life. (Col. 3:4) Hence, the old me died when Christ was crucified on the cross. What good news!