We have an equivalent saint, St. Paul who persecuted early Christians, in our Christian history.
It is not always the perfect ones who does the will of God, I noticed. 
We do the will of God when we smile and say a simple kind word to a lonely kid on the street!
 
' There was a man who had two sons. He went to the first and said, ‘Son, go and work today in the vineyard.’ ‘I will not,’ he replied. But later he changed his mind and went. Then the man went to the second son and told him the same thing. ‘I will, sir,’ he said. But he did not go.…