In every sport, coaches teach their athletes what they need to do and how they need to do it in order to have success. As believers in Christ, this is what God does for us, as well through His Word, the Bible.
A coach is never happier than when an athlete experiences success by performing in a game what they were taught to do in practice. You've seen how excited the defensive line coaches get in football—jumping up and down, head slapping, chest bumping, high-fiving his athletes the moment after they made a big sack.