McGarvey and Pendleton Commentaries
Acts 23 - Introduction
XXIII: 1, 2. No sooner had the prisoner and the Sanhedrim come face to face, than the chiliarch must have perceived that he was again to be disappointed in his efforts to understand the case; for, instead of preferring formal charges against Paul, the proceedings were opened by calling upon him to defend himself: (1) " Then Paul, looking earnestly on the Sanhedrim, said: I have lived in all good conscience before God until this day. (2) Then the high priest Ananias commanded those who stood by him, to smite him in the mouth. " No doubt the blow was as prompt as the word. The interruption was as unexpected as it was exasperating.