People in religions that teach that believers in other faiths are condemned, for example, tend to have lower life satisfaction. People who believe in heaven and hell tend to be less happy than those believe only in heaven.
Gretchen RubinThe belief that unhappiness is selfless and happiness is selfish is misguided. It's more selfless to act happy. It takes energy, generosity, and discipline to be unfailingly lighthearted.
Gretchen Rubin