Two things are infinite: the universe and human stupidity; and I'm not sure about the universe. -Albert Einstein
I'm sure the universe is full of intelligent life. It's just been too intelligent to come here. -Arthur C. Clarke
Don't fear artificial intelligence. Fear natural stupidity. -Unknown
Pain and suffering are always inevitable for a large intelligence and a deep heart. The really great men must, I think, have great sadness on earth. -Fyodor Dostoevsky, "Crime and Punishment"
You cannot see in another man any more than you have in yourself. -Arthur Schopenhauer
There's nothing more tedious than seeing how a person shows his intellect, especially if there isn't any. -Erich Maria Remarque
A high degree of intellect tends to make a man unsocial. -Arthur Schopenhauer