It used to be that a missionary heading overseas would say good-bye to friends and family with little expectation that they’d ever see any of them again. It was a life-long commitment, and frequently that life would be very short.

These days, any Christian can be a missionary. According to David Livermore, author of Serving with Eyes Wide Open, “four to five million Americans participate in religious short-term mission experiences” each year, spending $2.25 billion (yes, with a “b”) to do so.

At the same time, there are a little over 1.6 million full-time Christian missionaries, most of whom work in already-evangelized areas (Frontier Harvest Ministries). The numbers may be off somewhat (it’s very hard to get an accurate accounting), but the picture is clear—short-term missionaries greatly outnumber full-time workers. Keep that in mind for a moment.

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