最深刻的真理往往是我们否认的那些。

Every organism is in a struggle for existence.

Life is like riding a bicycle. To keep your balance, you must keep moving.

That's exhilarating if you're doing well, and very crushing if you're not. It leads, in the worst cases -- in the analysis of a sociologist like Emil Durkheim -- it leads to increased rates of suicide. There are more suicides in developed, individualistic countries than in any other part of the world. And some of the reason for that is that people take what happens to them extremely personally -- they own their success, but they also own their failure.

The world is full of obvious things which nobody by any chance ever observes.