And so sovereign Providence has often produced a remarkable effect--evil men making other evil men good. For some, when they think they suffer injustice at the hands of the worst of men, burn with hatred for evil men, and being eager to be different from those they hate, have reformed and become virtuous. It is only the power of God to which evils may also be good, when by their proper use He elicits some good result.
Boethius, The Consolation of Philosophy
evil, providence, theodicy, virtue