Well, it's not just that. There's also the difference between showing and telling in the course of the narrative itself, on a sentence by sentence level. Showing engages the senses, brings in the telling details, immerses the reader in the experience of the story. Telling is just that.
An example: one of these sentences is shown, the other told. Which is which?
The stark light of the torches moved terrible shadows across Kari's cheeks and forehead as his head bobbed once.