The simplest form of the Christian creed: κύριος the LXX[205] rendering of Jahweh is predicate to Ἰησοῦς; freq. in Acts in connexion with baptism and the first confession of faith (cf. Act 16:31); cf. Knowling, Witness etc., p. 261 f. The simple combination is most frequent in 1 Thes., but occurs in most of S. Paul’s Epp. and Heb 13:20, Rev 22:20-21, and elsewhere; cf. Robinson on Eph 5:26.
[205] LXX. the Septuagint Version of the Old Testament
καὶ πιστεύσῃς ἐν τῇ κ. ς. The aor. marks the initial act; the addition of ἐν τῇ κ. ς. distinguishes this act, as the expression (ἐν = with) of the whole heart, from bare assent to a fact; cf. Act 8:37 v.l., 1Th 4:14.