The speed of change is such that we have to run faster just to stay in the same place.

Never ask a barber if you need a haircut.

In the examination of the parts of animals, I have diligently endeavored to arrive at the truth.

不要担心你在数学上遇到的困难；我敢保证我遇到的困难比你还大得多。

I try to get rid of people who confidently answer questions about which they don't have any real knowledge.

最好的故事是那些让你感觉与人性相连的故事。