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作家成功的真正標準不在于獲得的贊譽，而在于觸動的心靈。

質量不是一種行為，而是一種習慣。

Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility this gives of systematically making them work towards definite ends.

"The major threats to survival that our ancestors faced - predators, starvation, disease - left their mark on our fears and anxieties."