What it reminds me the most of is Harry's discussion with Hermione about the need for heroic responsibility - about always shouldering the responsibility for any final outcome of events, instead of thinking that your job is done when you, say, go to Professor McGonagall and tell her to do something about it.
My guess(though I wouldn't assign a very high probability to this) is that it will be uttered by Harry while he's away from anyone he considers to be sane or responsible(like, say, Quirrell) and he fails to prevent something tragic from happening. A more specific hypothesis: Quirrell's identity is revealed by him doing something unspeakably evil and Harry blames himself for not piercing the disguise earlier.
The next discussion thread is here.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 85. The previous thread has long passed 500 comments. Comment in the 15th thread until you read chapter 85.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.
As a reminder, it’s often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: