“The difference between men is in their principle of association.”
1840s, Essays: First Series (1841), History
Context: The difference between men is in their principle of association. Some men classify objects by color and size and other accidents of appearance; others by intrinsic likeness, or by the relation of cause and effect. The progress of the intellect is to the clearer vision of causes, which neglects surface differences. To the poet, to the philosopher, to the saint, all things are friendly and sacred, all events profitable, all days holy, all men divine. For the eye is fastened on the life, and slights the circumstance. Every chemical substance, every plant, every animal in its growth, teaches the unity of cause, the variety of appearance.
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Ralph Waldo Emerson 727
American philosopher, essayist, and poet 1803–1882Related quotes

“The main difference between men and women is that men are lunatics and women are idiots.”

The Socialist Party and the Working Class (1904)
Context: The Republican and Democratic parties, or, to be more exact, the Republican-Democratic party, represent the capitalist class in the class struggle. They are the political wings of the capitalist system and such differences as arise between them relate to spoils and not to principles.
Source: The Lonely Dead (2004), Ch. 14

“There is very little difference between men and women in space.”
Independent on Sunday, 9 June 1991
Source: A Theory of Justice (1971; 1975; 1999), Chapter II, Section 13, pg. 79