In science, the only constant is change.

生命的价值不在于能活多少天，而在于我们如何使用这些日子。

The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.

如果经济学家能够使自己被认为是谦逊的，能干的，与牙医水平相当的人，这是好的。

What can be said at all can be said clearly, and what we cannot talk about we must pass over in silence.

Fortune favors the prepared mind.

The mind is not a thing, but a process—an ever-changing flow of experiences and adaptations.

译文：我家中有一个娇美的女儿，皮肤洁白如玉。