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People must feel that the natural world is important and valuable and beautiful and wonderful and an amazement and a pleasure.

There is nothing which I dread so much as a division of the republic into two great parties, each arranged under its leader, and concerting measures in opposition to each other.

成功的關鍵不僅在于制造產品，還在于理解使用它的人。

如果你從未跌倒過，那么你也就從未努力過。

沒有人能在相當長的時間里，對自己戴一副面具，對眾人戴另一副面具，而最終不困惑于哪一副才是真實的。