Paul was First of All a Missionary

"Paul was first of all a missionary, an organizer of far-flung little communities around the Mediterranean that united clusters of disparate people in the startling confession that God had raised a crucified man, Jesus, from the dead and thus initiated a new age in which the whole world was to be transformed.. The letters of Paul that survive in the New Testament are his pastoral communications with these mission outposts. Though separated from them, he continued to offer them exhortation and counsel about how to conduct their common life 'in a manner worthy of the gospel of Christ' (Phil. 1:27)."

-Richard B. Hays, The Moral Vision of the NT, 16.