It can be difficult to understand how "other people" believe in things that are "clearly" false - i.e. "clearly" to us. Every culture has beliefs, and while there may be a few people in any culture who are skeptical of all things, these people are rare: most people believe in things that cannot be verified and/or can be or will be verified as wrong.

The problem you are asking about is a matter of perception: "my" beliefs seem plausible to me, but "their" beliefs seem silly and superstitious. It is easy to perceive other people's beliefs as clear examples of misplaced faith because we were not raised in their cultures. Similarly, those things that we take on faith because we were raised with them seem entirely plausible because the things we believe in are woven into the cultural fabric of our being. There is no culture that does not have aspects a story and faith that could not be called "magic and mythology" by an outside observer.

So your question could just as easily be, "how do we maintain our own belief in things that others call magic and mythology, even when others see those beliefs as entirely false superstition?" The answer to that question dwells within the unfathomable part of our humanity. We believe, because that is what people do. People in the past believed, because that is what people have always done.