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

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

Education is an ornament for the prosperous, a refuge for the unfortunate.

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

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

My weapon is literature

A witty saying proves nothing.

For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.

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

Reading without reflecting is like eating without digesting.

The first principle is that you must not fool yourself and you are the easiest person to fool.

The reading of all good books is like conversation with the finest men of past centuries.

Many much-learned men have no intelligence.

All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.

If one cannot enjoy reading a book over and over again, there is no use in reading it at all.

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

Imagination is more important than knowledge.

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.

Opinion is the medium between knowledge and ignorance.

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

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