Better know nothing than half-know many things.
Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.
The only true wisdom is in knowing you know nothing.
As we acquire more knowledge, things do not become more comprehensible but more mysterious.
The secret of life is not enjoyment but education through experience.
The schools ain't what they used to be and never was.
What sculpture is to a block of marble, education is to a human soul.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
I like poems you can tack all over with a hammer and there are no hollow places.
Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.
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.
If the facts don't fit the theory, change the facts.
A little knowledge is a dangerous thing. So is a lot.
If you can't explain it simply, you don't understand it well enough.
The most savage controversies are those about matters as to which there is no good evidence either way.
I cannot teach anybody anything. I can only make them think
God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.
If one cannot enjoy reading a book over and over again, there is no use in reading it at all.
Education is a human right with immense power to transform. On its foundation rest the cornerstones of freedom, democracy and sustainable human development.
No man's knowledge here can go beyond his experience.
Opinion is the medium between knowledge and ignorance.