出自汉·桓宽《盐铁论·地广》。释义：不因为是自己的亲近就给以重赏；也不因为与自己疏远就忘掉给人恩惠。

经济学的艺术在于理解规则与行为之间的微妙互动。

If you’re not making mistakes, you’re not trying hard enough.

Twenty years of romance make a woman look like a ruin; but twenty years of marriage make her look like a public building.