Courage, conviction and confidence.
I am indebted to my father for living, but to my teacher for living well.
The first principle is that you must not fool yourself and you are the easiest person to fool.
The fullness of knowledge only comes through the awareness of ignorance.
Many much-learned men have no intelligence.
I cannot teach anybody anything. I can only make them think
The highest activity a human being can attain is learning for understanding, because to understand is to be free.
No power and no treasure can outweigh the extension of our knowledge.
A witty saying proves nothing.
With educated people, I suppose, punctuation is a matter of rule; with me it is a matter of feeling. But I must say I have great respect for the semi-colon; it's a useful little chap.
If the facts don't fit the theory, change the facts.
An investment in knowledge pays the best interest.
The books that the world calls immoral are books that show the world its own shame.
The whole of science is nothing more than a refinement of everyday thinking.
Words can be like X-rays if you use them properly - they'll go through anything. You read and you?re pierced.
My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
Real learning comes about when the competitive spirit has ceased.
A child educated only at school is an uneducated child.
Real knowledge is to know the extent of one's ignorance.
It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.