积极情绪不是微不足道的奢侈品，而是最佳功能的关键必需品。
Positive emotions are not trivial luxuries, but instead may be critical necessities for optimal functioning.
译文：今生我虽然不能身为男子，加入他们的行列，但我的心却比男子还要刚烈。
Hatred is the most accessible and comprehensive of all the unifying agents.
Les passions sont comme les maladies: plus on les combat, plus elles se renforcent.
No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.
