Make you perfect (katartisai). First aorist active optative of katartizw, to equip, as in 1 Corinthians 10:5 . A wish for the future. See 1 Corinthians 1:10 ; 2 Corinthians 13:11 ; 2 Timothy 3:17 . Working in us (poiwn en emin). "Doing in us." Some MSS. read "in you." Well-pleasing (euareston). Compound adjective (eu, aresto). Usually with the dative ( Romans 12:2 ), here with enwpion autou more like the Hebrew. This is one of the noblest doxologies in the N.T.