Information is not knowledge.
A little learning is a dangerous thing.
The temptation shared by all forms of intelligence: cynicism.
The more you know, the more you see.
Men who reject the responsibility of thought and reason can only exist as parasites on the thinking of others.
A rational man is guided by his thinking – by a process of Reason – not by his feelings and desires.
Ignorance never settles a question.
The profound thinker always suspects that he is superficial.
The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.
Even when the experts all agree, they may well be mistaken.
I am sometimes shocked by the blasphemies of those who think themselves pious.
Of course not. After all, I may be wrong.
The deepest sin against the human mind is to believe things without evidence.
It is better to have a fair intellect that is well used than a powerful one that is idle.
The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
There’s a heart beneath the boobs and a brain beneath the wig.
Science has not yet taught us if madness is or is not the sublimity of the intelligence.
The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.
We have now sunk to a depth at which restatement of the obvious is the first duty of intelligent men.
A woman uses her intelligence to find reasons to support her intuition.