All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.

It is possible to fly without motors, but not without knowledge and skill.

The most important part of teaching is to teach what it is to know.

A child miseducated is a child lost.

If you want the present to be different from the past, study the past.

Knowing others is wisdom, knowing yourself is Enlightenment.

Learning gives creativity, Creativity leads to thinking, Thinking provides knowledge, Knowledge makes you great.

It is beyond a doubt that all our knowledge begins with experience.

If the facts don't fit the theory, change the facts.

The task of a writer is not to solve the problem but to state the problem correctly.

The highest activity a human being can attain is learning for understanding, because to understand is to be free.

Many much-learned men have no intelligence.

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

Real knowledge is to know the extent of one's ignorance.

Books are as useful to a stupid person as a mirror is useful to a blind person.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

A little knowledge is a dangerous thing. So is a lot.

It is what you read when you don't have to that determines what you will be when you can't help it.

I am so clever that sometimes I don't understand a single word of what I am saying.

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.