To talk about painting is not only difficult but perhaps pointless too.

有成就感的人会把世界看成一个友好的世界，并乐于看到它照原样保持下去，但失意者却会乐于看到世界急遽改变。

我喜欢挑战自己，把自己推到极限。

Quality is not a choice; it is a requirement.

"I don't know what I'm doing tomorrow, I don't have a plan. I'm happy to be alive, to be healthy, and to have my kids."

对称性不仅是自然的一种属性，而且是寻找物理定律的指导原则。