Did Paul Actually Convert to Christianity? by Bible History
The late Dr. Krister Stendahl, of Harvard Divinity School, suggests that he did not. This video summarizes his reasons why. Stendahl notices that Paul and the author of Acts describe Paul's transformative experience with Jesus in the same terms as the Jewish prophets Isaiah, Jeremiah, and Ezekiel describe there own, yet we do not describe these prophets as having converted from Judaism.