Harry recognizes the power of truth, and doesn't want give that power out indiscriminately.
If we interpret the power of truth as being "the power to know whether things are true", or "the power conferred by believing true things rather than false things", then giving that power out indiscriminately, to every sentient being in the world, is the exact thing that Harry wants to do.
That is the interpretation I'm thinking of, and no he doesn't. When he describes science to Draco, he says that not keeping secrets is one of their mistakes. Spreading the power to everyone has bad consequences he wants to avoid (things like knowledge that could enable a small faction of people to destroy the world). In this case, it would have consequences he thinks are bad, which are people interfering with Quirrell's plans to stay alive.
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 99, 100, and 101. The previous thread is at nearly 500 comments.
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, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27
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: