I think you're missing the mundane explanation. Harry really likes Quirrell. He's the person he most relates with in the world; he's the person he looks up to; he's the smart/strong/cool teacher Harry wants to be when he grows up.
Surely there were other people, maybe better people, to trust and befriend? Professor McGonagall, Professor Flitwick, Hermione, Draco, not to mention Mum and Dad, it wasn't like Harry was alone...
Only...
A choking sensation grew in Harry's throat as he understood.
Only Professor McGonagall, Professor Flitwick, Hermione, Draco, they all of them sometimes knew things that Harry didn't, but...
They did not excel above Harry within his own sphere of power; such genius as they possessed was not like his genius, and his genius was not like theirs; he might look upon them as peers, but not look up to them as his superiors.
None of them had been, none of them could ever be...
Harry's mentor...
That was who Professor Quirrell had been.
Any person, especially a child, will gladly ignore and forgive a million counter-indications as long as they really like the person.
For it is a sad rule that whenever you are most in need of your art as a rationalist, that is when you are most likely to forget it.
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: