The difference in mind between man and the higher animals, great as it is, is certainly one of degree and not of kind. - Charles Darwin (The Descent of Man, and Selection in Relation to Sex Quotes)

The difference in mind between man and the higher animals, great as it is, is certainly one of degree and not of kind.

Source:Part I. The Descent or Origin of Man, Chapter IV. Comparison of the Mental Powers of Man and the Lower Animals
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