想要行善的人在门外敲著门；爱人的，看见门是敞开的。

光是建筑中最重要的材料。

Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passion, they cannot alter the state of facts and evidence.

The world is a story waiting to be written.

I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.

物理学的创新往往来自于以新的方式看待老问题。