Some of us are guilty of namedropping—casually referencing famous people we know to boost our sense of self-importance. Some of us are also guilty of “nation-dropping.” That kept happening in a coffee meeting I had with a college student recently. He was a twentysomething with a burning passion for Christ and a fine collection of exotic stamps in his passport. The conversation kept coming back to some other place he had been to serve the poor and the lost. Passport stamps are becoming the spiritual merit badges of our day.

But radical discipleship is not adventure tourism.