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

“A stupid man's report of what a clever man says is never accurate, because he unconsciously translates what he hears into something that he can understand.”

“Because I was stupid, I said, To hell with it, and I joined a drama school. [It was a ridiculously little school, which was first run by a very clever woman, but she soon was replaced by] "a nitwit, who had read a few books on the Actor's Studio and was very much into analysis, instead of teaching us how to walk and talk!"”

“Very often in everyday life one sees that by losing one's temper with someone who has already lost his, one does not gain anything but only sets out upon the path of stupidity. He who has enough self-control to stand firm at the moment when the other person is in a temper, wins in the end. It is not he who has spoken a hundred words aloud who has won; it is he who has perhaps spoken only one word.”

“I think he's a very good technician. And he has something in Psycho, he had some moments. Psycho is one of his most interesting pictures because he had to make the picture very fast, with very primitive means. He had little money, and this picture tells very much about him. Not very good things. He is completely infantile, and I would like to know more — no, I don't want to know — about his behaviour with, or, rather, against women. But this picture is very interesting.”

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

“What does he say?' he asked.
'He’s very sad,’ Úrsula answered, ‘because he thinks that you’re going to die.'
'Tell him,' the colonel said, smiling, 'that a person doesn’t die when he should but when he can.”

“And now I wish I hadn’t been civil, because he says he shall not despair! He is as stupid as Endymion!”
“No, no!” said Alverstoke soothingly. “Nobody could be as stupid as Endymion!”

“She is very plain. What does Henry see in her?'"
"He thinks she's stupid. He finds it restful.”

“I divide my officers into four groups. There are clever, diligent, stupid, and lazy officers. Usually two characteristics are combined. Some are clever and diligent -- their place is the General Staff. The next lot are stupid and lazy -- they make up 90 percent of every army and are suited to routine duties. Anyone who is both clever and lazy is qualified for the highest leadership duties, because he possesses the intellectual clarity and the composure necessary for difficult decisions. One must beware of anyone who is stupid and diligent -- he must not be entrusted with any responsibility because he will always cause only mischief.”