实现明天理想的唯一障碍是今天的疑虑。
The only limit to our realization of tomorrow will be our doubts of today.
"Life is a series of choices, and the ones you don't make are just as important as the ones you do."
生活是一系列的选择，而你没有做出的选择和你做出的选择一样重要。
所有生而为人的人都需要教育，因为他们注定要成为真正的人，而不是野兽、迟钝的动物或木头块。
There are two kinds of violence of peace， that is the law and etiquette.
The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
那些疯狂到认为自己能改变世界的人，往往真的改变了世界。