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What is called common sense is excellent in its department, and as invaluable as the virtue of conformity in the army and navy,--for there must be subordination,--but uncommon sense, that sense which is common only to the wisest, is as much more excellent as it is more rare.

Henry David Thoreau, Jeffrey S. Cramer (2007). “I to Myself: An Annotated Selection from the Journal of Henry D. Thoreau”, p.13, Yale University Press
What is called common sense is excellent in its department, and as invaluable as the virtue of conformity in the army and navy,--for there must be subordination,--but uncommon sense, that sense which is common only to