Learning never exhausts the mind.

To every action there is always an equal and opposite or contrary, reaction

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

Many much-learned men have no intelligence.

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

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

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

That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.

The great difficulty in education is to get experience out of ideas.

I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.

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.

I have no special talents. I am only passionately curious.

A witty saying proves nothing.

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

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

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

Industrialize or perish.

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

I decided to teach because I think that any person who studies philosophy has to be involved actively.

I like poems you can tack all over with a hammer and there are no hollow places.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.