"When a merely moral man or woman comes in contact with baseness and immorality and treachery, the recoil is so desperately offensive to human goodness that the heart shuts up in despair. The marvel of the Redemptive Reality of God is that the worst and the vilest can never get to the bottom of His love. Paul did not say that God separated him to show what a wonderful man He could make of him, but 'to reveal His Son in me.'" Oswald Chambers, (1935/1963), My Utmost for His Highest, February 3, Barbour Publishing.
Chambers is expounding three tenets here:
The reaction of a simply moral man is to recoil at debauchery without taking action. I recall the testimony of Jim Cymballa of Brooklyn Tabernacle Choir of his encounter with a homeless man who visited his assembly. He offered the man money thinking that would suffice. The homeless knocked away his hand and said: "I do not want your money, I want the Jesus you are talking about." Pastor Cymballa was forced to do more than serving from afar.
Secondly, having God's Redemptive love means you are prepared to stoop low enough to scoop up a wretched sinner. Pastor Cymballa had to hug the smelly, dirty man, and remained in a rocking embrace!
Finally, this is God's purpose for all of us! That we be separated unto God for the purpose of revealing Himself in us. Are we willing?