Joe Callihan 
Parables from God Series – Parable of the Two Sons: Which One Are You? [EPUB ebook] 

Parable of the Two Sons, is about how we have responded to doing the works which Father God requires of each of us. Using my own example, I trace the words and actions of the son who in the parable given by Jesus, said, 'I will not work in your vineyard.’ Then later repented and went to work. It is a good parable to cause self examination, and perhaps motivate people to take action in doing their Fathers’ work.