数学家研究纯数学不是因为它有用；他研究它是因为他喜欢它，他喜欢它是因为它美丽。

自由不仅仅是摆脱枷锁，而是以尊重和增进他人自由的方式生活。

我创作的灵感来自痛苦，也来自快乐。

Your most unhappy customers are your greatest source of learning.

I don’t really have studios. I wander around around people’s attics, out in fields, in cellars, anyplace I find that invites me.