The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.

The free, exploring mind of the individual human is the most valuable thing in the world.

We don't inherit the oceans from our ancestors; we borrow them from our children.

学习数学的最好方法就是做数学。

世界上充满了神奇的事物，耐心地等待着我们的感官变得更加敏锐。

生活是一场冒险，每一个挑战都是成长的机会。

我从不允许自己对任何事情有意见，除非我比他们更了解另一方的观点。