Illusions are art, for the feeling person, and it is by art that you live, if you do.
You must not lose faith in humanity. Humanity is an ocean; if a few drops of the ocean are dirty, the ocean does not become dirty.
Look at all the sentences which seem true and question them.
An adventure is only an inconvenience rightly considered. An inconvenience is an adventure wrongly considered.
Memory feeds imagination.
Hearing voices no one else can hear isn't a good sign, even in the wizarding world.
The world tolerates conceit from those who are successful, but not from anybody else.
The lesson which life repeats and constantly enforces is 'look under foot.' You are always nearer the divine and the true sources of your power than you think.
History is more or less bunk.