Long story short: you need a big question, or a big concept.
Every time I come back to this scene ag the end of Star Trek: The Next Generation, the strength of the concept is just superb.
Q tells Picard that exploration isn’t a physical thing, limited to the five senses. It’s exploring existence and opening your mind up to the seemingly impossible.
That’s where faith finds its place in the universe. I love this exchange. I hope that when I tackle story ideas of my own, I’m able to succinctly describe big truths and concepts like this.
It’s what makes truly good art.