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

The man who is fond of books is usually a man of lofty thought, and elevated opinions.

Reading is to the mind what exercise is to the body.

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

Education is the ability to listen to almost anything without losing your temper or your self-confidence.

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

One test of the correctness of educational procedure is the happiness of the child.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

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

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

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.

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

Necessity is the mother of invention.

It is possible to fly without motors, but not without knowledge and skill.

My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.

The schools ain't what they used to be and never was.

The most important part of teaching is to teach what it is to know.

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

Reading without reflecting is like eating without digesting.

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