Found on Cyberbrethren .. an excerpt from The Church from Age to Age: A History from Galilee to Global Christianity:
“By the year 250, Christianity had spread to the limits of the known world. . . . The Church spread rapidly over a wide geographic area, increasing phenomenally in numbers . . . This work was done by ordinary Christians. We know of no missionary societies; we hear nothing of organized effort. Wherever Christians went doing their regular tasks, the pagan saw a different kind of individual and heard about ‘the Savior.’ … When the early Christians themselves recount how they learned of the Gospel, they usually confess that their faith was the result of casual contact with that “way of life.” . . . The work was not done by people who called themselves missionaries but by rank-and-file members. The least among men, even the unknown, are indeed the greatest in the kingdom of heaven.”
The Church from Age to Age, p. 13. Print edition. Kindle edition