Spiritual maturity is impossible to measure. I know. I have tried. When I worked for a small Christian liberal arts university, we wanted to test whether our students gained anything from all the spiritual formation groups, Bible courses, and chapels. I heard other Christian schools were trying to develop similar rubrics, but I never heard of a particularly successful measure. Measuring spiritual maturity is not like measuring knowledge. You can’t simply pass a test or write a paper.  In fact, a fair amount of disagreement exists about spiritual maturity. I think one might need to possess some to recognize it, but I hate even to nail that down. After all,…