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

Don't learn to do, but learn in doing.

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

Courage, conviction and confidence.

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

There is nothing more awful, insulting, and depressing than banality.

The whole of science is nothing more than a refinement of everyday thinking.

Industrialize or perish.

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

Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family.

The knowledge of all things is possible

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

Investigate, educate and organize.

Opinion is the medium between knowledge and ignorance.

No power and no treasure can outweigh the extension of our knowledge.

Better know nothing than half-know many things.

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

The only true wisdom is in knowing you know nothing.

I learned very early the difference between knowing the name of something and knowing something.

The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.

Education is the kindling of a flame, not the filling of a vessel.