The ordinary American - as far as I can tell - knows so much less than he did fifty years ago and has such poor work habits compared with fifty years ago that the average multiplicand of knowledge/capabilities is a much smaller number than it was in 1961.

Every man gets a narrower and narrower field of knowledge in which he must be an expert in order to compete with other people. The specialist knows more and more about less and less and finally knows everything about nothing.

The utmost extent of man's knowledge is to know that he knows nothing.

Knowledge is proud that it knows so much wisdom is humble that it knows no more.

Mistakes are after all the foundations of truth and if a man does not know what a thing is it is at least an increase in knowledge if he knows what it is not.

Knowledge is power only if man knows what facts not to bother with.

He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors.

People are taken aback by a confident pretty girl who knows what she wants in life and isn't going to let anyone get in her way. And you know what it's all about? Jealousy.

Truth knows no color it appeals to intelligence.

The Queen's intelligence network is a hell of a lot better than anyone's in this palace. Bar none. She knows everything. I don't know how she does it. And she sees everything.