He is no wise man that will quit a certainty for an uncertainty.

Not only is he not a genius; he is intellectually as undistinguished as it is possible to be.

I'm not clever enough to be a physicist.

He has no native Passion, because he is not a Thinker — & has probably weakened his Intellect by the haunting Fear of becoming extravagant.

The human race does not have a very good record of intelligent behaviour.

It seems to me that the human race simply isn’t advanced enough yet to be able to trust any subset of itself with the power to run the lives of the rest.

It was not that he was unintelligent. It was just that he was not emotionally able to comprehend democracy.

He does not believe that does not live according to his belief.

Not that smart. Not that hot. Not that nice. Not that funny. That's me: I'm not that.

Simon's obviously very smart. But he's not the smartest person I know.

He who will not use the thoughts of other men's brains proves that he has no brains of his own.

That man is not truly brave who is afraid either to seem or to be, when it suits him, a coward.

Having a great intellect is no path to being happy.

And just so conservatives don't take it to heart, I don't think Bush did it, Cuz he isn't that smart.