We have Pax Americana. The world is clamoring to learn business English. We have the information the transportation. The Gospel transforms every relationship we have. Paul encourged the early believers to imitate their leaders.
Children imitate the behavior of their parents.
The apostolic teams stayed long enough at the early churches so that the people caught the lives they saw. Unbelievers need to see how Christians relate, he added. Lost people need you and they need me. Exponential increase comes.