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問題的根本原因在于，在現(xiàn)代世界里，愚蠢的人自以為是，而聰明的人充滿懷疑。

保持開放心態(tài)的麻煩在于，人們總會堅持過來試圖往里面塞東西。

科學與農(nóng)業(yè)的結(jié)合將為農(nóng)民創(chuàng)造更美好的未來。

"I don't write for children. I write for people."

數(shù)學的美在于它能夠用一種既精確又普遍的語言來描述宇宙。

All men are created equal.

A managed forest is like a symphony—every tree plays its part at the right time.

要找到自己，就要為自己思考。

Sometimes life hits you in the head with a brick. Don't lose faith.

森林的真正價值不能僅用板英尺來衡量。

"I always try to put a little bit of humor in my drawings, because I think it makes them more enjoyable."