"[...] Yet the truly unique feature of our language is [...] the ability to transmit information about things that do not exist at all. As far as we know, only Sapiens can talk about entire kinds of entities that they have never seen, touched or smelled.
Legends, myths, gods, and religions appeared for the first time with the Cognitive Revolution. [...] This ability to speak about fictions is the most unique feature of Sapiens language."

Excerpt from SAPIENS [A Brief History of Humankind] by YUVAL NOAH HARARI

Thoughts on language and the structure of reality.