Being baptized, Saul - now his name Paul - became the great apostle of Jesus Christ. He preached the Good News to the Gentiles - people who believed in many different gods. They knew very little about the Lord of the Jews, the Law of Moses and the Messiah, because they were from other nations. But after hearing Paul, many began to believe in Jesus. Paul traveled much by land and sea, and everywhere he spoke of Jesus. He had faithful friends who helped him in everything.
Soon, churches began to appear in many places: Christian communities. Those who believed in Jesus worked together, prayed, helped each other. Paul gave all his strength to support them in difficult times, taught God's truth, resolved doubts. If he could not come to them himself, he sent letters to his friends. In these letters, Paul praised the disciples for their faith, reproached them for their misdeeds, consoled those who were in trouble, answered questions, gave advice, thought about God and people. Such letters to Christian communities were written by other apostles, trying to teach as many people as possible how to live as the Lord wants.