Another one now, chapter 3, when Harry sees Quirrell for the first time:
“I had the strangest feeling that I knew him...” Harry rubbed his forehead. “And that I shouldn’t ought to shake his hand.” Like meeting someone who had been a friend, once, before something went drastically wrong… that wasn’t really it at all, but Harry couldn’t find words.
Another one now, chapter 3, when Harry sees Quirrell for the first time: