教师必须为形成较好人类而献出一切。
如果我们想保护森林，就必须先了解它们。
Your time is limited, so don't waste it living someone else's life. Don't be trapped by dogma—which is living with the results of other people's thinking. Don't let the noise of others' opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary.
Feel the depth of life with the clarity of the soul.
To see a world in a grain of sand, and a heaven in a wild flower, hold infinity in the palm of your hand, and eternity in an hour.
The unity of Europe is a historical necessity.