All men are liable to error; and most men are, in many points, by passion or interest, under temptation to it.
Innovation is the soul of enterprise development; without innovation, there is no future.
The psychologist must avoid all metaphysical assumptions.
明白事理的人使自己适应世界;不明事理的人想使世界适应自己。所以,所有进步都要靠不明事理的人。