“…I am a stupid, stupid man. I am a very, very dumb person. I…" [laughs in self-deprication] "He has an Auchenai Soulpriest! Why would you do that?! What is wrong with you?!”

“Simon-"From now on I will only adress people by nodding at them." Clary-"That's stupid why would you do that?" Simon-"Because it says that 'I am a badass, and I recognive that you too, are a badass”

“I am no longer afraid of getting old. Indeed I can't believe I ever said anything so stupid. So childish. So offensive and.
But mainly, so very, very stupid. I desperately want to grow old.”

“If I play a stupid girl and ask a stupid question, I've got to follow it through, what am I supposed to do, look intelligent?”

“I can normally tell how intelligent a man is by how stupid he thinks I am.”

“If I could fine you for stupid, I would fine you for stupid.”

“If this man had not twelve thousand a year, he would be a very stupid fellow.”

“It's not just that I'm stupid; it's that I'm just smart enough to know how stupid I am. I wish I weren't so stupid. Or that I were stupider.”

“I am as I am. The world is as it is. Whether I am content with that has very little to do with it.”

“Because of the self-confidence with which he had spoken, no one could tell whether what he said was very clever or very stupid.”