At anxious moments, people who believe in the truth of a single idea, people with faith in a single teaching, want purity. They stand on the busy roadside and see the motley world. They suspect there is much filth, sin, falsity and hypocrisy going on.

When their sense of anxiety becomes more acute, they come to a decision: there must be rejection, if necessary ‘heathenizing’, or even force used so that filth can be eliminated and the world p