“Brothers,” Paul replied, “I was not aware that he was the high priest, for it is written: ‘Do not speak evil about the ruler of your people.’”
5. I knew not, brethren. Those who think that this excuse of Paul hath in it no figure, do not well mark the contrary objections wherewith their error is refuted. They say that Paul knew not the high priest, because he had been absent long time; as if he were ignorant that he was chief priest, who is the chief in the council, and hath the uppermost room.
Perhaps when Paul was brought, as he often was (corpus cum causa - the person and the cause together), before heathen magistrates and councils, where he and his cause were slighted, because not at all understood, he thought, if he were brought before the sanhedrim at Jerusalem, he should be able to deal with them to some good purpose, and yet we do not find...
Commenting on Acts 23:1-5
Then said Paul, I wist not, brethren, that he was the high priest,.... Or I did not know that he was the high priest; and the sense is, that he did not really know him, either because he had been long absent from Jerusalem; and besides there were new high priests made, sometimes every year, and sometimes oftener, that it is no wonder he should...