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

Never help a child with a task at which he feels he can succeed.

I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.

The schools ain't what they used to be and never was.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

Science is a way of thinking much more than it is a body of knowledge.

Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.

Seek knowledge from the cradle to the grave.

Make it a rule never to give a child a book you would not read yourself.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

One test of the correctness of educational procedure is the happiness of the child.

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

Know what you are talking about.

If you're teaching today what you were teaching five years ago, either the field is dead or you are.

The only good is knowledge and the only evil is ignorance.

Education is the best friend. An educated person is respected everywhere. Education beats the beauty and the youth.

Just because I don't care doesn't mean I don't understand.

Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

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.

Knowing others is wisdom, knowing yourself is Enlightenment.