Acts 26:2

“I think myself happy, King Agrippa, etc.] This was an handsome and artificial way of introducing his defense, and of gaining the affection and attention of the king, and yet was not a mere compliment; for it had been his unhappiness hitherto, that his case was not understood; neither Lysias the chief captain, nor the governors Felix and Festus, knew anything of the rites and customs of the Jews, and could not tell what to make of the questions of their law, of which Paul was accused: but it was otherwise with Agrippa, he was master of them, and this the apostle looked upon as a circumstance in his own favour: because I shall answer for myself this day before thee; not before him as a judge,…”

“I think myself happy - I esteem it a favor and a privilege to be permitted to make my defense before one acquainted with Jewish customs and opinions. His defense, on former occasions, had been before Roman magistrates, who had little acquaintance with the opinions and customs of the Jews; who were not disposed to listen to the discussion of the points of difference between him and them, and who looked upon all their controversies with contempt. See Acts 24:25. They were, therefore, little qualified to decide a question which was closely connected with the Jewish customs and doctrines; and Paul now rejoiced to know that he was before one who, from his acquaintance with the Jewish customs and…”

“King Agrippa - There is a peculiar force in thus addressing a person by name. Agrippa felt this. Acts 26:3”