These people serve the Lord with fire and vigor. Eager to please God, they attend many religious services and functions.
This is a great time for them, and it can solidify their Christian foundation, but often this is just a phase in their life. And after time, they start cooling off. Their pursuit of the Lord is very emotional. And when their emotions fight them, they have a hard time staying strong. As Christians we are in it for the long haul. Remember Jesus said in Matt 10:22, "He who stands firm to the end will be saved."