the-apple-is-the-fruit:

Rey found herself in his mind even as he invaded hers. She felt his rage, like a ruinous storm that filled his head, and his hatred, and his lust to dominate and humiliate those who wronged him. But she also felt his hurt, and his loneliness. And his fear – that he would never prove as strong as Darth Vader, the ghost who haunted his dreams.

Kylo had retreated at finding Rey in his head – had practically fled from her. 

 ― Jason Fry, The Last Jedi: Expanded Edition (Exclusive Edition).

What else Rey would have seen in Kylo Ren’s mind if he has not receded?