Romans 15:18

οὐ γὰρ κ.τ.λ. The comparison with 2 Corinthians 10:8 f. seems to show that a double qualification of καύχησις is compressed into this rather clumsy declaration (1) I will only boast of my own works (not ἐν�), (2) I will not dare to boast of these works as my own, but only as Christ’s achievements through me: the thought of (1) crops up again in Romans 15:20, of (2) in 19.

εἰς ὑπακοὴν ἐθνῶν. Cf. Romans 16:19; to effect obedience (to Christ, of faith) on the part of Gentiles.

λόγῳ καὶ ἔργῳ. In speech and action: i.e. both in the preaching of the Gospel and in exemplifying it in life: more specific than 2 Corinthians 10:11; cf. Luke 24:9; Acts 7:22; Colossians 3:17; 2 Thessalonians 2:17; 1 John 3:18.