"Tennis is a sport where you have to be strong mentally and physically, but the mental part is even more important."

Words are wise men's counters, they do but reckon by them; but they are the money of fools.

魔鬼最伟大的伎俩是让世界相信他不存在。

You cannot hope to build a better world without improving the individuals. To that end, each of us must work for our own improvement and, at the same time, share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.

你必须愿意失败才能成功。