To teach how to live without certainty and yet without being paralyzed by hesitation is perhaps the chief thing that philosophy， in our age， can do for those who study it.

Reinforcement is the central factor in the acquisition of new behavior patterns.

世界和生命是一体的。

诗人是为不可名状之物命名的人。

每首诗都是一首情诗。

So foul and fair a day I have not seen.