Discerning the Tradition (Art. 4, 5; Acts 17:10-15)

The apostle Paul is one who goes from place to place preaching the word of God or to be precise the canon of Scripture. As he preaches from place to place he encounters various agitators. Agitators in Paul's context are people who deny that Christ is the messiah. How can we be confident that Paul is really an apostle sent from God? How can we be confident that Christ is the Messiah? How do we know that his words are the words from God?