Do not flinch from experiences that might destroy your beliefs. The thought you cannot think controls you more than thoughts you speak aloud. Submit yourself to ordeals and test yourself in fire. Relinquish the emotion which rests upon a mistaken belief, and seek to feel fully that emotion which fits the facts.

That which the truth nourishes should thrive.

To worship a sacred mystery was just to worship your own ignorance.

Like that's the only reason anyone would ever buy a first-aid kit? Don't take this the wrong way, Professor McGonagall, but what sort of crazy children are you used to dealing with?" "Gryffindors," spat Professor McGonagall, the word carrying a freight of bitterness and despair that fell like an eternal curse on all youthful heroism and high spirits.

If you handed [character] a glass that was 90% full, he'd tell you that the 10% empty part proved that no one really cared about water.

Trying and getting hurt can't possibly be worse for you than being... stuck.

If you are equally good at explaining any outcome, you have zero knowledge.