Christ suffered and died...to make us holy, blameless and perfect.
He has now reconciled (you) in his body of flesh by his death, in order to present you holy and blameless and above reproach before him.
"Because of Christ's death we are becoming holy-but we are not yet fully holy. The joyfully encouragement here is that the evidence of our perfection before God is not our experienced perfection, but our experienced progress. The good news is that being on the way is proof that we have arrived." (Piper)