Real knowledge is to know the extent of one's ignorance.
The most savage controversies are those about matters as to which there is no good evidence either way.
I like poems you can tack all over with a hammer and there are no hollow places.
The first principle is that you must not fool yourself and you are the easiest person to fool.
Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.
Books are for people who wish they were somewhere else.
It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
Know what you are talking about.
A cynic is a man who knows the price of everything, and the value of nothing.
Men are born ignorant, not stupid. They are made stupid by education.
There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.
The task of a writer is not to solve the problem but to state the problem correctly.
If I have seen further it is by standing on the shoulders of Giants.
Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.
An investment in knowledge pays the best interest.
If there were no bad people, there would be no good lawyers.
The idea is to try to give all the information to help others to judge the value of your contribution; not just the information that leads to judgment in one particular direction or another.
That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.
Science is a way of thinking much more than it is a body of knowledge.
A little knowledge is a dangerous thing. So is a lot.