I once asked a deeply religious man if he considered himself a truly pious person. He responded that while he aspired to be one, he felt that he fell short in two areas. One of those areas, he said, was his not being a happy enough person to be considered truly pious.

His point was that unhappy religious people reflect poorly on their religion and on their Creator. He was right; in fact, unhappy religious people pose a real challenge to faith. If their faith is so impressive, why aren't these devoted adherents happy? There are only two possible reasons: either they are not practicing their faith correctly, or they are practicing their faith correctly and the religion itself is not conducive to happiness. Most outsiders assume the latter reason. Unhappy religious people should therefore think about how important being happy is—if not for themselves, then for the sake of their religion. Unhappy, let alone angry, religious people provide more persuasive arguments for atheism and secularism than do all the arguments of atheists.