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

如果我们不创造并控制我们的环境，我们的环境就会创造并控制我们。

We begin with the hypothesis that any subject can be taught effectively in some intellectually honest form to any child at any stage of development.

真相很少是简单的，而且往往比我们对自己说的谎言更痛苦。

我认为对古代好的东西要阐述奖惩，对现在好的东西要创造，不过是希望好的东西越来越多罢了。 

Leadership in agriculture means having the courage to plant seeds whose harvest you may never see.