上句见：Day263
The Story of Philosophy《哲学的故事》第1章Plato第4节IV. The Ethical Problem第5段第1句：

Perhaps this hard "immoralism" reflects the development of imperialism in the foreign policy of Athens, and its ruthless treatment of weaker states.13 "Your empire," said Pericles in the oration which Thucydides invents for him, "is based on your own strength rather than the good will of your subjects." And the same historian reports the Athenian envoys coercing Melos into joining Athens in the war against Sparta:"You know as well as we do that right, as the world goes, is only in question for equals in power; the strong do what they can, and the weak suffer what they must."14 We have here the fundamental problem of ethics, the crux of the theory of moral conduct. What is justice? — shall we seek righteousness, or shall we seek power? —is it better to be good, or to be strong?
13Barker, p.73
14History of the Peloponnesian War, v.105
浙江大学译本：或许这种尖锐的“不道德主义”正反映了当时雅典对外政策的帝国主义发展，和它对其他弱国毫不留情的态度。②
②巴克，《希腊政治理论》，第73页

解析

1、Perhaps this hard "immoralism" reflects the development of imperialism in the foreign policy of Athens, and its ruthless treatment of weaker states.13
或许这种尖锐的“非道德主义”反映了雅典对外政策中帝国主义的发展，以及其对较弱国家残忍的态度。
immoralism（非道德主义）：主张在某些情况下道德规范是不必要的，否定它的普遍有效性，倡导人们摆脱道德的束缚，依据自身的利益和欲望行事。尼采也持有类似的观点，
imperialism: a policy or practice by which a country increases its power by gaining control over other areas of the world 帝国主义
Did he not for twenty years thereafter, resist all the temptations of imperialism, all the enticements of militaristic expansion? 此后二十年，他不是抵制了帝国主义的一切诱惑，抵制了军国主义扩张的一切诱惑吗？《西南联大英文教本》
ruthless: having no pity, cruel or merciless不留情面的，坚决的，果断的
Others in fact were more ruthless.实际上别人更残忍。《万物简史》

2、13Barker, p.73
13巴克，《希腊政治理论》，第73页
本书中引用巴克《希腊政治理论》第一次出现在上面一节中雪莱对柏拉图的赞扬（Day218）

或许这种尖锐的“非道德主义”反映了雅典对外政策中帝国主义的发展，以及其对较弱国家残忍的态度。