User blog comment:Mesi99/the title of the first episode/@comment-179280-20140820212902

I don't think Ymir's line in Chapter 47 is related to Eren's one at the start of the story. Ymir explicitely states she was "living a nightmare", but Eren doesn't seem to remember what he was dreaming. He's been shown to be more related to Historia in regards to they not being able to remember their dreams (sorry for my crappy camera):