"Tennis has given me everything, and I want to give something back."

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

The fundamental law of the militia is, that it be created, directed and commanded by the laws, and ever for the support of the laws.

Success is not final, failure is not fatal: It is the courage to continue that counts.

在一个无意义的世界里，追求快乐是唯一有意义的活动。