 But neither of these ideas by itself expresses our unconditionally complete end, as human reason demands in its practical use. A perfectly moral world by itself would not constitute our “whole and complete good […] even in the judgment of an impartial reason,” because it is human nature also to need happiness (5:110, 25). And happiness by itself would not be unconditionally good, because moral virtue is a condition of worthiness to be happy (5:111). So our unconditionally complete end must combine both virtue and happiness. In Kant’s words, “virtue and happiness together constitute possession of the highest good in a person, and happiness distributed in exact proportion to morality (as the worth of a person and his worthiness to be happy) constitutes the highest good of a possible world” (5:110–111). It is this ideal world combining complete virtue with complete happiness that Kant normally has in mind when he discusses the highest good.