according to the Abrahamic religions, there is merit in belief (that you go to a place that is supposed to be nice), and it is emphasized that the virtuous believe in God and follow its teachings, but it does not actually say how belief in God is actually a virtue.
(In the Old Testament, it says "The fool has said in his heart, “There is no God.” They are corrupt, They have done abominable works, There is none who does good.": fool in this sense means an immoral person, rather than what is meant in modern usage).
Improving your happiness and changing your personality for the better
Jungian theory is not grounded in empirical data (pdf file)
The case against type dynamics (pdf file)
Cautionary comments regarding the MBTI (pdf file)
Reinterpreting the MBTI via the five-factor model (pdf file)
Do the Big Five personality traits interact to predict life outcomes? (pdf file)
The Big Five personality test outperformed the Jungian and Enneagram test in predicting life outcomes
Evidence of correlations between human partners based on systematic reviews and meta-analyses of traits