Who also made us sufficient for such confidence (o kai ikanwsen hma). Late causative verb from ikano (verse Romans 5 ) first aorist active indicative, "who (God) rendered us fit." In N.T. only here and Colossians 1:12 . As ministers of a new covenant (diakonou kainh diaqhkh). Predicate accusative with ikanwsen. For diaqhkh see on "Mt 26:28" and for diakono on Matthew 20:26 and for kainh (fresh and effective) on Luke 5:38 . Only God can make us that.