As you may have guessed, because you have this on your handout, Milton is alluding here to the famous words of the Old Testament prophet Isaiah.

你们可能已经猜到了，因为讲义上都有，弥尔顿在这儿影射到这些,先知艾赛亚旧约里的一些很有名的词。

耶鲁公开课 - 弥尔顿课程节选

You can't fight as a hoplite, in other words, unless you can afford to pay for your equipment and that excludes a goodly number of citizens who are too poor to fight in the phalanx.

换句话说,你不能加入步兵方阵,除非你自己能出钱买装备,这样有相当多的公民,会因为贫穷无法在方阵中战斗

耶鲁公开课 - 古希腊历史简介课程节选