Make you perfect (καταρτισα). First aorist active optative of καταρτιζω, to equip, as in Hebrews 10:5. A wish for the future. See 1. Corinthians 1:10; 2. Corinthians 13:11; 2. Timothy 3:17.

Working in us (ποιων εν εμιν). "Doing in us." Some MSS. read "in you."

Well-pleasing (ευαρεστον). Compound adjective (ευ, αρεστος). Usually with the dative (Romans 12:2), here with ενωπιον αυτου more like the Hebrew. This is one of the noblest doxologies in the N.T.