Fact or fiction which one is more powerful

I cannot figure this out. What has more  influence on human behavior: fiction or non fiction. My feeling is that fiction is the most powerful one but i am not 100%  sure. Another question is what we perceive as factual really factual or is it fiction? since it seems that most of the stories we hear about and  supposedly  hard core information in lots of cases is made up. It seems that a great deal of life is all made up through story telling and the simple execution of ideas which falls in the same category. In the case of our personalities they also seem to me to be made up, almost as characters in a play or a movie that only difference is that we play the role for a whole life time. Fiction gives us the opportunity to expand beyond our limitations and explore the unlimited while non fiction is about dealing with a fixed and frozen reality with all its limitations. It is something I have been thinking about for a long time. If you can help me out with some feedback on this matter I would appreciate. All the best and may you play your best role possible with no limitations, then it become a fact or not. Just play.