Challenge Increases Development

I am currently leading a mission trip with high school students in Memphis. We are constructing a soup kitchen out of an abandoned house. Today we broke out the concrete front porch and finished removing all the old drywall. We are going to focus on the outside while the electrician finishes up the wiring. The youth pastor I am working with noticed that his students were more focused, worked harder and were showing signs of growth due to the challenge of the project. He is right, the more challenging the project or the ministry, the more students respond.