We need never be ashamed of our tears.

The beauty of mathematics lies in its ability to simplify complex ideas into elegant structures.

穷人往往缺乏做出正确选择所需的信息，而即使他们拥有这些信息，也常常不信任它。

No president who performs his duties faithfully and conscientiously can have any leisure.

疯狂与天才之间的界限是由那些害怕两者的人划定的。