The Role of Torah in the Thought of Paul the Apostle

Was Paul’s goal of writing to dictate doctrine, talk about himself or to persuade Gentiles to become believers in the Jewish Messiah in the acharit-hayamim, or End of Days? Did Paul see himself as a religious convert to a new religion, or as a Missionary to Gentiles? Did he see Torah as universally applicable, or did he differences between Jew and Gentile? Christians need to hear this.