The question again arises whether Eusebius is referring here to the second class of Ebionites only, and is contrasting their conduct in regard to Sabbath observance with that of the first class, or whether he refers to all Ebionites, and contrasts them with the Jews. The subject remains the same as in the previous sentence; but the persons referred to are contrasted with ἐκεῖνοι, whom they resemble in their observance of the Jewish Sabbath, but from whom they differ in their observance of the Lord’s day. The most natural interpretation of the Greek is that which makes the οὗτοι δὲ refer to the second class of Ebionites, and the ἐκεῖνοι to the first; and yet we hear from no one else of two sharply defined classes separated by religious customs, in addition to doctrinal opinions, and it is not likely that they existed. If this interpretation, however, seems necessary, we may conclude that some of them observed the Lord’s day, while others did not, and that Eusebius naturally identified the former with the more, and the latter with the less, orthodox class, without any especial information upon the subject. It is easier, too, to explain Eusebius’ suggestion of a second derivation for the name of Ebionite, if we assume that he is distinguishing here between the two classes. Having given above a reason for calling the first class by that name, he now gives the reason for calling the second class by the same.