"Bokononism is based on the concept of foma, which are defined as harmless untruths. A foundation of Bokononism is that the religion, including its texts, is formed entirely of lies; however, one who believes and adheres to these lies will have peace of mind, and perhaps live a good life. The primary tenet of Bokononism is to "Live by the foma that make you brave and kind and healthy and happy."
https://en.wikipedia.org/wiki/Bokononism