How we cite our quotes: (Chapter.Paragraph)
Quote #1
There are familiar faces on these trains, people I see every week, going to and fro. I recognize them and they probably recognize me. I don't know whether they see me, though, for what I really am. (1.17)
What is she? At this point, we don't yet know how Rachel is deceiving us… mainly because she's deceiving herself, too.
Quote #2
Maybe I'll tell [Scott] Tom was hitting on me. That'll put an end to it. (2.28)
What we as readers don't know at this point is that Megan would actually be telling the truth here. Tom was hitting on her… because they were having an affair. But that isn't confirmed for another twenty or so chapters.
Quote #3
On the way back down the road, he passes me in his car, our eyes meet for just a second and he smiles at me. (2.53)
This is Megan's (and author Paula Hawkins') first attempt at deceiving us. She's very tricky with this "he" pronoun business, keeping us guessing who "he" is for a few chapters.