The Biblical parable of the two sons illustrates a great human dilemma often repeated in literature and life. It is a very simple story: One son responds to his father's request to work in the vineyard by declining, yet thinks better of his intention and indeed in the end does his father' bidding. The other son, keen to appear obedient, accepts the charge, but decides against actually doing the work. The rhetorical question of who has done the father's will answers itself.
"The Parable of the Two Sons,"
Journal of Conventional Weapons Destruction: Vol. 11
, Article 4.
Available at: http://commons.lib.jmu.edu/cisr-journal/vol11/iss2/4