Or, these words denote three orders in the Church. “The two men in the field” denote the order of preachers [marg. note: praedicatores], to whom is committed the field of the Church; by “the two grinding at the mill,” the order of the married priests [marg. note: conjugati], who while with a divided heart they are called first to one side, then to the other, do, as it were, ever turn round a mill; by “the two in one bed,” the order of the continent [marg. note: continentes], whose repose is signified by the bed. But in all these orders are good and bad, righteous and unrighteous, so that some shall be taken, and some left.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).