“Stupidity cannot be cured. Stupidity is the only universal capital crime; the sentence is death. There is no appeal, and execution is carried out automatically and without pity.”

“in a matter of some generations all the stupid ones will die out and those with your discipline will inherit the Earth”

“Ignorance is curable, stupid is forever.”

“Sin lies only in hurting other people unnecessarily. All other "sins" are invented nonsense. (Hurting yourself is not sinful -- just stupid.)”

“Never underestimate the power of human stupidity.”

“There is no way that writers can be tamed and rendered civilized or even cured...the only solution known to science is to provide the patient with an isolation room where he can endure the acute stages in private and where food can be poked to him with a stick. If you disturb the patient at such time, he may break into tears or become violent.”

“You have attributed conditions to villainy that simply result from stupidity.”