The important question is how did they determine the people were happy? If you believe in fairy tails and that you are one of the few choosen righteous who get

The important question is how did they determine the people were happy? If you believe in fairy tails and that you are one of the few choosen righteous who gets eternal happiness you might very well believe you're happy all the time. You might also be full of a lot of shame/guilt put on you which causes you to say you're happy when you're really not.