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The love of democracy is that of equality.

Go for a business that any idiot can run – because sooner or later, any idiot probably is going to run it.

The only thing we have to fear is the absence of fear itself.

Millions saw the apple fall, but Newton asked why.

The study of psychology must include the study of the environment in which the mind operates.

Never let age be a barrier to learning or discovery.

人類的思想是如此復雜，事物之間是如此糾纏，以至于要解釋一片草葉，就必須繪制宇宙的圖表。