Separation entails also separation to God's service. That means, of course, the observance of his laws, especially the laws of purity, the rejection of pagan practices, and so on.

分离也意味着脱离上帝的侍奉，这就是说，遵守他的律法，尤其是圣洁的律法，拒绝异教习俗，等等。

耶鲁公开课 - 旧约导论课程节选

And he was especially obsessed with racial purity.

他尤为看重纯正的种族血统

耶鲁公开课 - 美国内战与重建课程节选