John Kilgallen, «Acts 28,28 — Why?», Vol. 90 (2009) 176-187
The Isaian citation, used by Paul to describe his encounter with certain Jews in Rome, does not stand alone: it leads to a conclusion, a conclusion which is an imperative and an assurance. What is commanded is a knowledge of the plan of God already in motion, a plan to offer salvation to Jews and Gentiles. As information for Jews of Rome, this final word of Paul is best understood as a motive for repentance; knowledge of the divine plan of God, which will succeed (28b), serves as an encouragement to Roman Jews to «turn and be healed by Me».