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.

What is now proved was once only imagined.

Make it a rule never to give a child a book you would not read yourself.

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

Know what you are talking about.

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

Better know nothing than half-know many things.

Opinion is the medium between knowledge and ignorance.

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

The most savage controversies are those about matters as to which there is no good evidence either way.

The knowledge of all things is possible

Common sense is the collection of prejudices acquired by age eighteen.

A witty saying proves nothing.

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

You can never be overdressed or overeducated.

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

Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important.

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

Reading without reflecting is like eating without digesting.

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

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.