"There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy."

[She quotes it back just as softly, still watching, still intent on keeping him grounded. That's what it seems to have come down to, at this point; that once again, just like before she came in, he's tempted to drift away on his own thoughts, and she's the only one holding him down to make sure he stays where he ought to.

And what a reversal that is, isn't it — that for once, he's the one slipping away, and she's the one pursuing.]

You can't think my past has something to do with what I saw.