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

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.

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

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

If I have seen further it is by standing on the shoulders of Giants.

The progressive development of man is vitally dependent on invention.

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

A thought is an idea in transit.

Patience is a virtue, and I'm learning patience. It's a tough lesson.

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

I cannot live without books.

Investigate, educate and organize.

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

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

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

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

Books are as useful to a stupid person as a mirror is useful to a blind person.

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

Knowledge becomes evil if the aim be not virtuous.

A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.

We could never learn to be brave and patient, if there were only joy in the world