Side line: “kata sarka” (according to the flesh) must be taken as adverbial, it qualifies verbs for “knowing” – how they know or in this sense not knowing – “not according to the flesh.”

「血气」（中译﹕外貌；意﹕体）﹕是词，指「」、「识」人这动词。他们如何识（或不识）﹕「不体」。