Errors, like straws, upon the surface flow; he who would search for pearls must dive below.

The only limit to our realization of tomorrow is our doubts of today.

教育的真正价值不仅在于事实的积累，而在于训练思维进行批判性和创造性的思考。

释义：每个人应该先处理好自己的事情，不要去过多干涉别人的事情。

最具可持续性的农场是那些为几代人着想的农场。