真理不在光明中被发现，而在我们不敢直视的阴影中。
可持续性不是一种选择，而是能源未来的必然要求。
How far you go in life depends on your being tender with the young, compassionate with the aged, sympathetic with the striving and tolerant of the weak and strong. Because someday in your life you will have been all of these.
幸福的秘诀是面对这个世界很可怕的事实。
"I don’t want to be known just as a tennis player. I want to be known as a good person."