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The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.
Mathematics is not a spectator sport; to understand it, one must engage with it actively.
出自汉·桓宽《盐铁论·疾贪》。贪婪卑鄙的风气源自处于上位的统治者,而不在下层民众;对民众的教育、对国民素质的改良在于执政者的措施是否得当,而不在于人民自身的素质。