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

Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.

I cannot teach anybody anything. I can only make them think

It isn't what we don't know that gives us trouble, it's what we know that ain't so.

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

No man's knowledge here can go beyond his experience.

Books! I dunno if I ever told you this, but books are the greatest gift one person can give another.

Seek knowledge from the cradle to the grave.

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

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

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

The progressive development of man is vitally dependent on invention.

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

Liberty without Learning is always in peril and Learning without Liberty is always in vain.

Civilization is a race between disaster and education.

If help and salvation are to come, they can only come from the children, for the children are the makers of men.

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

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

I am indebted to my father for living, but to my teacher for living well.

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

A cynic is a man who knows the price of everything, and the value of nothing.