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

I think that kids have a greater capacity for processing things than we give them credit for.

The deepest sin against the human mind is to believe things without evidence.

If you can't explain it simply, you don't understand it well enough.

Investigate, educate and organize.

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

You can never learn less, you can only learn more.

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

My weapon is literature

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

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

The knowledge of all things is possible

Most people have never learned that one of the main aims in life is to enjoy it.

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

A child miseducated is a child lost.

Education is our passport to the future, for tomorrow belongs to the people who prepare for it today.

Dare to think for yourself.

Study without desire spoils the memory, and it retains nothing that it takes in.

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

When you know better you do better.

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