Stupidity has always the shadow of meanness. The more intelligent you are, the less mean you are. The utterly intelligent person cannot have any meanness; it is impossible. He can have only love and compassion.
The stupid person has to be mean because that is the only way he thinks he can win. The intelligent person has no desire to win, the intelligent person is already victorious in his intelligence. The intelligent person is already superior in his intelligence, he has not to compete for it. The stupid person has to continuously compete. And because he is stupid, he cannot rely on his intelligence, he has to rely on something else: he becomes mean, cunning, deceptive, a hypocrite.
To me, stupidity is the only sin, and everything else is just a by-product of it. And intelligence is the only virtue; everything else that we have known as virtue follows it like a shadow.
-Rajneesh