"I have drawn the great moral lesson, perhaps the only one of any practical value, to avoid those situations of life which bring our duties into conflict with our interests, and which show us our own advantage in the misfortune of others; for it is certain that, in such situations, however sincere our love of virtue, we must, sooner or later, inevitably grow weak without perceiving it, and become unjust and wicked in act, without having ceased to be just and good in our hearts."