Mental activity is always directed toward some end.

In republican governments, men are all equal; equal they are also in despotic governments: in the former, because they are everything; in the latter, because they are nothing.

最能干的人之所以能干，在于不做不应该做的事，最明智的人之所以明智，在于不去考虑不该考虑的问题。人贵在有自知之明，能明白自己的身份，知道该做什么不该做什么，什么事该考虑、什么事不用自己操心，该放手的时候就要放手。分内之事，尽力去做。

一个讲述物品的丢失、毁灭、消失的物品。它不讲述自己。它讲述别人。它会包含它们吗？

让项目更快完成的最好方法是尽早开始。

Innovation is not just about technology; it's about changing the way people think about dairy.

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

必须仔细考虑基因改造的伦理影响。

要理解行为，就要寻找其中的效用。