Not progressing in his Christian faith

I know a guy who has been going to our church for 11 years now. He’s a decent guy I guess, but there just doesn’t seem to be anything happening in his Christian life.
He shows up at church just about every Sunday and even manages to come to almost every Bible study and pastor’s class. [...]

“Backsliders”

What is a “backslider“?

Are they easy to spot?

Have you ever been one?

How does one stop being a “backslider“?