The world is full of poetry. The air is living with its spirit; and the waves dance to the music of its melodies, and sparkle in its brightness.

The true power of mathematics is not in its complexity, but in its simplicity and elegance.

做出伟大工作的唯一方法是热爱你所做的事情。

Success is not final, failure is not fatal: it is the courage to continue that counts.

我们不是从祖先那里继承了地球；我们是从子孙那里借来的。