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Men think they think upon the great political questions, and they do; but they think with their party, not independently; they read its literature, but not that of the other side

Mark Twain (1973). “What Is Man? and Other Philosophical Writings”, p.96, Univ of California Press
Men think they think upon the great political questions, and they do; but they think with their party, not independently; they read its literature, but not that of the other side