Happiness is not the reward of virtue, but virtue itself; nor do we delight in happiness because we restrain our lusts; but, on the contrary, because we delight in it, therefore are we able to restrain them.
—Spinoza, Ethics
幸福不是美德的奖赏，而是美德本身；我们也不喜欢幸福，因为我们抑制了欲望，相反，因为我们喜欢它，所以我们能够约束它。
斯宾诺莎，伦理学（谷歌翻译仅供参考）