“Three crucial decades in world history. That is all it took. In the years between AD 33 and 64 a new movement was born. In those thirty years it got sufficient growth and credibility to become the largest religion the world has ever seen and to change the lives of hundreds of millions of people. It has spread into every corner of the globe and has more than two billion putative adherents. It has had an indelible impact on civilization, on culture, on education, on medicine, on freedom, and of course on the lives of countless people worldwide. And the seedbed for all this, the time when it took decisive root, was in these three decades. It all began with a dozen men and a handful of women: and then the Spirit came.”
–Michael Green, Thirty Years That Changed the World: The Book of Acts for Today (Grand Rapids: Eerdmans, 1993/2002), p. 7.