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...I have always maintained that, excepting fools, men did not differ much in intellect, only in zeal and hard work; and I still think there is an eminently important difference.

Charles Darwin (2015). “Darwin on Evolution: Words of Wisdom from the Father of Evolution”, p.23, Skyhorse Publishing, Inc.
...I have always maintained that, excepting fools, men did not differ much in intellect, only in zeal and hard work; and I still think there is an eminently important difference.