It is to the extent that we grasp the truth of the doctrine that the desire to be holy is created within us. If I really believe that while I was 'dead in trespasses and sins' God quickened me, sent His Son into the world to die for me and for my sins that I might be saved form hell, and might be saved for heaven - if I really believe that, I must say 'Love so amazing, so divine, demands my soul, my life, my all'. It is logic, and it demands my soul, my life, my all. I cannot resist such logic - I must!
Martyn Lloyd-Jones, Christian Unity p22
By the way, this was a whole sermon from Lloyd-Jones on Ephesians 4:1, just on the very first word. "Therefore" Only the Doctor could do that.