“Never underestimate the power of human stupidity.”

“Ignorance is curable, stupid is forever.”

“The capacity of humans to believe in what seems to me highly improbable- from table tapping to the superiority of their children- has never been plumbed.”

“Liberty is never unalienable; it must be redeemed regularly with the blood of patriots or it always vanishes. Of all the so-called natural human rights that have ever been invented, liberty is least likely to be cheap and is never free of cost.”

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

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

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