这个引言似乎是转自19世纪英国功利主义和自由派哲学家约翰.斯图尔特.密尔。
The quote appears to be a paraphrase of John Stuart Mill, the 19th-century English philosopher of utilitarianism and liberty.
约翰·密尔是英国19世纪功利主义思想家，社会改良主义者。
John Stuart Mill was an English utilitarian philosopher and social reformist in the 19th century.
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