What to believe in? Maybe the default mode should be to believe in everything? Everything we can imagine. Kind of like in Improv. The default mode is to say "Yes."
So if we believe in everything, every door, every window, every possibility is alive. Of course, this will make us sort of gullible, and susceptible and open to all kinds of crazy ideas, and maybe we need to take some crazy ideas with a "grain of salt."
We can sift through the crazy. Pick and choose what we like.
So we believe, but we keep our eyes open, keep our eyes peeled, and hone a healthy skepticism too. Which of course, if you think of it, is pretty damn contradictory. So yes, why not - live with the contradiction. That's okay.