Omitted in A. V. Introducing a contrast with the double-minded.
The brother of low degree (ὁ ἀδελφὸς ὁ ταπεινὸς)
Lit., the brother, the lowly one. Not in the higher Christian sense of ταπεινὸς (see on Mat 11:29), but, rather, poor and afflicted, as contrasted with rich.
Rejoice (καυχάσθω)
Not strong enough. It is, rather, boast. So Rev., glory. Compare Rom 5:3; Phi 3:3.
In that he is exalted (ἐν τῷ ὕψει αὐτοῦ)
Lit., in his exaltation. Rev., in his high estate.