The deepest sin against the human mind is to believe things without evidence.
To every action there is always an equal and opposite or contrary, reaction
Real learning comes about when the competitive spirit has ceased.
If the facts don't fit the theory, change the facts.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
The great difficulty in education is to get experience out of ideas.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
Books are as useful to a stupid person as a mirror is useful to a blind person.
The secret of life is not enjoyment but education through experience.
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.
Imagination is more important than knowledge.
The most important part of teaching is to teach what it is to know.
The progressive development of man is vitally dependent on invention.
The knowledge of all things is possible
Those who fail to learn the lessons of history are doomed to repeat them.
Knowing is not enough; we must apply. Willing is not enough; we must do.
Make it a rule never to give a child a book you would not read yourself.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.
Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.
Investigate, educate and organize.