Matthew Poole and continuators on Acts 26:3

3 Especially, because I know thee to be expert in all customs and questions which are among the Jews: wherefore I beseech thee to hear me patiently.

This is not flattery, but a plain confession of what was true; for Agrippa, by reason of his birth and breeding, could not be wholly ignorant of those things in question, 1. About the Messiah; 2. About the Resurrection: 3. About the giving of the Holy Ghost.

It being a matter that concerned Religion, and the Life and Liberty of a man, nothing but ignorance or impiety could take him off from attending unto it.