More on measuring spiritual growth

You might want to have a look at Out of Ur's interview with Veggie Tales co-creator Phil Vischer. Here's a sample:

Near the end we were selling a gazillion [Veggie Tales] videos and I was getting four hundred fan letters a day, but one day I was reading my Bible and I came across the verse that lists the fruit of the Spirit. It occurred to me that none of those things were present in my life. It didn’t say the fruit of the Spirit is impact, large numbers, or selling lots of videos. I realized something was not right.

That makes sense: fruit of the Spirit as indicator of spiritual health.