Environmental stewardship is not optional - it's our responsibility to future generations.

You must change nothing in your writing without absolute necessity. If it is necessary， then change with simplicity.

How many roads must a man walk down before you call him a man?

人类追求知识的欲望源于对宇宙之谜的好奇心。

The future we want must be invented. Otherwise we will get one which we don't want.

The Government of the United States is a definite Government, confined to specified objects. It is not like the state governments, whose powers are more general.

Stories you read when you're the right age never quite leave you. You may forget who wrote them or what the story was called. Sometimes you'll forget precisely what happened, but if a story touches you it will stay with you, haunting the places in your mind that you rarely ever visit.

只怕小人有才能，帮助有才的小人后患无穷；只怕君子无才，无才而处事，即使贤德又有什么补益。

真正的发现之旅不在于寻找新的风景，而在于拥有新的眼光。