Grace comes free of charge to people who do not deserve it and I am one of those people... Now I am trying in my own small way to pipe the tune of grace. I do so because I know, more surely than I know anything, that any pang of healing or forgiveness or goodness I have ever felt comes solely from the grace of God.
Individuals and societies are not helpless victims of heredity. We have the power to change - not by looking "down" to nature but "up" to God, who consistently calls us forward to become the people we were designed to be. A confused world urgently needs a model of what that looks like. If Christians fail to provide that model, who will?
I once heard a theologian remark that in the Gospels people approached Jesus with a question 183 times whereas he replied with a direct answer only three times. Instead, he responded with a different question, a story, or some other indirection. Evidently Jesus wants us to work out answers on our own, using the principles that he taught and lived.