Professional body builders have massive muscles and glistening tans. Why? They don’t play a sport. They don’t use their muscles to pull trucks. They are not prison guards or firemen. They just put on a Speedo and strut. It’s all for show. What a waste of their incredible strength!
This is what Christians do when they build all of their spiritual muscles just for show but never use them to do anything significant. They feel good about themselves but have little impact on the kingdom.