"Contracts are signed out of the necessity spawned by the presence of sin in our fallen nature. Because we have an enormous capacity to wound each other, sanctions have to be imposed by legal contracts. Contracts not only restrain sin, but also protect the innocent in the case of legal and moral violation. With every commitment I make to another human being, there is a sense in which a part of me becomes vulnerable, exposed to the response of the other person,"R.C.Sproul (excerptfromCrucial Questions booklet:Can I Know God's Will?).

How contracts (1)restrain sin,(2) protect the innocent, and (3)make one vulnerable?