According to some surveys, given the same living conditions, the level of happiness for those who have faith far exceeds those who do not.
Because the ones who have faith can more easily find their identities in a disorderly society, as well as refuge for their minds and purpose in their lives. Most importantly, having faith can help people better control their worldly pursuits, knowing to some degree the futility of relying on those pursuits for ultimate happiness. Relatively speaking, their desires are less rampant and hence they feel happier in life overall.
~ Luminous Wisdom Book Series 6