As expressed by lincoln, what are two central ideas in this sentence from this paragraph? “if we shall suppose that american slavery is one of those offenses which, in the providence of god, must needs come, but which, having continued through his appointed time, he now wills to remove, and that he gives to both north and south this terrible war as the woe due to those by whom the offense came, shall we discern therein any departure from those divine attributes which the believers in a living god always ascribe to him? ”