1. "Castles in the air - -they are so easy to take refuge in. And so easy to build as well."
2. “I'm no longer prepared to accept what people say and what's written in books, I must think things out for myself, and try to find my own answer.”
3. “It is inexcusable for scientists to torture animals; let them make their experiments on journalists and politicians.”
4. "It's not just what we inherit from our mothers and fathers that haunts us. It's all kinds of old defunct theories, all sorts of old defunct beliefs, and things like that. It's not that they actually live on in us; they are simply lodged there, and we cannot get rid of them. I've only to pick up a newspaper and I seem to see ghosts gliding between the lines."
5. “Look into any man's heart you please, and you will always find, in every one, at least one black spot which he has to keep concealed.”
6. "Really to sin you have to be serious about it."
7. "The majority is never right. Never, I tell you! That's one of these lies in society that no free and intelligent man can help rebelling against. Who are the people that make up the biggest proportion of the population -- the intelligent ones or the fools? I think we can agree it's the fools, no matter where you go in this world, it's the fools that form the overwhelming majority."
8. “The strongest man in the world is he who stands alone.”
