By 613 A.D., Muhammad began sharing the message that Allah had given him with others, beginning with his family and close friends. As word spread that Muhammad had seen a vision from Allah, many in Makkah began to persecute him and his followers. One of the most important elements of the economy in Makkah were the pilgrims who traveled to the city to worship their idols. The wealthy merchants feared that this new religion, which forbade the worship of idols, would hurt their economy.
Muhammad did have some early success, however, mainly with the poorer classes of people who lived in and around Makkah. They were drawn to his message because he taught that the poor and wealthy were equal, and that the wealthy should share their means with those who did not have enough.
One cannot collect all the beautiful shells on the beach. One can collect only a few, and they are more beautiful if they are few.