There are times when a kind of weirdness settles over evangelicalism, when for a while people are swept away by strange and flawed ideas. This usually happens when Christians are attempting to counter ideas that are prevalent outside the church. Instead of reacting in a measured way, we collectively over-react. I think the purity and courtship movements were two examples—or perhaps one example, since they were so closely aligned. You can hardly remember or evaluate either without raising the name …