When Luke taught Rey to meditate for the first time, her mind went straight to a hole in the ground. This scared Luke and he asked her to pull back, saying she had gone straight to the dark side.
Later on, we find that the hole is real. I was thinking it would be like the cave Luke saw in Empire Strikes Back, where you have to face your demons.
The movie even gave this impression, using scary and tension filled music when Rey finds a strange mirror inside. But then, nothing happens. Rey just sees herself.
Was there a point to this scene? Did I miss something? Why did the movie show this hole, representing the dark side in Rey's psyche, and then do nothing with it?