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心理學必須植根于有機體為生存而斗爭的現實中。

神學是心靈的語言，而不是頭腦的語言。

The world must be set in order. The time has come when ethics must be dealt with by science, and never again by mere opinion.

The best investments are often the ones that are the most unpopular.

語言是權力的第一個犧牲品。