Opposites can be powerful metaphors and ways to characterise concepts or forces in a setting. The Force in Star Wars has a Light Side and a Dark Side. There is Good and Evil. Law and Chaos. Yin and Yang. The classical elements come in opposed pairs: Fire and Water; Earth and Air.
Magic often comes in two opposed flavours: Arcane (magic achieved through knowledge and study) and Divine (magic achieved through faith and piety).
If you ever want something to come across as cool and mysterious, give it two sides. Then sit back and watch your players try to figure out which one to use.
Commentary by memnarch (who has not seen the movie)
Ahhh, not a Force Levitate, a Force..... Clairvoyance? A pretty neat little bit. There's some grasses and fungi things, a dead rodent thing, parts of the island, a Porg nest, and a nest with broken eggs. Hmm, more evidence that this could be a big lesson about finding balance in things. I guess that this could be something Disney kept then, or maybe I'm misremembering the old EU things and this is new. I'm curious to see where this scene is going to end up, if it does lead to anything.
Transcript
Luke: Reach out with your feelings. Scan the island. What do you see?
Rey: Can I get a map?
GM: You see... more metaphorical things.
{images of scenes around the island illustrating what the GM describes}
GM: Life. {plants growing}
GM: Death... and decay, that feeds new life. {a skeleton decaying in the soil}
GM: Warmth. {the sun on rocks}
GM: Cold. {the brooding sea}
GM: Peace. {a porg in a nest}
GM: Violence. {waves crash over a nest with shattered eggs}
Rey: Dogs and cats living together...
GM: And this is why I do the narration.