After the Resurrection, Jesus spent approximately 40 days talking to his disciples and other followers. He then took his disciples to the Mount of Olives, and commanded them to go spread the Gospel to all the world.
Approximately 10 days later, on the Day of Pentecost, the Holy Ghost fell on 120 followers of Christ, and the Church was born. Finally, it was time for them to obey Christ's command to evangelize the world.
While this book discusses...