“Stupidity is far more dangerous than evil, for evil takes a break from time to time, stupidity does not.”

“Evil isn’t the real threat to the world. Stupid is just as destructive as Evil, maybe more so, and it’s a hell of a lot more common. What we really need is a crusade against Stupid. That might actually make a difference.”

“It's not evil, Rand. I know something evil when I smell it. This isn't evil, it's just incredibly stupid.”

“Stupidity is a more dangerous enemy of the good than malice.”

“It's a library, only the stupid or the evil are afraid of those”

“Stupidity is the same as evil if you judge by the results.”

“Goodness was more difficult than evil. Evil men knew that more than good men. That's why they became evil. That's why it stuck with them. Evil was for those who could never reach the truth. It was a mask for stupidity and lack of love. even of people laughed at the notion of goodness, if they found it sentimental, or nostalgic, he said, it had to be fought for.”

“Time does to the body what stupidity does to the soul”

“Most "necessary evils" are far more evil than necessary.”

“Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.”