On a freezing January afternoon, a small group gathered in my living room to pray for a few minutes and ask God for guidance. It wasn’t the first time that I had asked the Lord for direction. And often, while praying about a particular situation or decision, I had sensed him speaking to me. But it was different this time. The six of us—all ordinary people in our twenties, some in college and others with jobs—were about to try something new: an evangelistic expedition to the local mall.