A witty saying proves nothing.

I do not know how to teach philosophy without becoming a disturber of the peace.

The fullness of knowledge only comes through the awareness of ignorance.

In mathematics you don't understand things. You just get used to them.

Education is a human right with immense power to transform. On its foundation rest the cornerstones of freedom, democracy and sustainable human development.

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

Courage, conviction and confidence.

Books are for people who wish they were somewhere else.

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

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

The most savage controversies are those about matters as to which there is no good evidence either way.

The knowledge of all things is possible

The secret of life is not enjoyment but education through experience.

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.

Don't worry that children never listen to you; worry that they are always watching you.

A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.

I cannot live without books.

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

What is freedom of expression? Without the freedom to offend, it ceases to exist.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

Those who fail to learn the lessons of history are doomed to repeat them.