I can accept failure, everyone fails at something. But I can't accept not trying.

One must be a god to be able to tell successes from failures without making a mistake.

I’m not playing for the records. I play tennis because I love it.

The only real freedom is the freedom to say no.

卓越没有捷径。

对心灵的研究必须严格经验化。

经济发展的艺术不在于看现在，而在于预见未来。