The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know, our knowledge of our ignorance
The wise know too well their weakness to assume infallibility; and he who knows most knows best how little he knows.
The beginning of an acquaintance whether with persons or things is to get a definite outline of our ignorance.
But let a man know that there are things to be known, of which he is ignorant, and it is so much carved out of his domain of universal knowledge.
Intelligence is required to be able to know that a man knows not.
As a human being, one has been endowed with just enough intelligence to be able to see clearly how utterly inadequate that intelligence is when confronted with what exists.
The worst, the most difficult thing I think is that the more you become intrigued by science and the information is out there, the more you are aware of the paucity of your own knowledge.
It is not so bad being ignorant if you are totally ignorant; the hard thing is knowing in some detail the reality of ignorance.
