Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.

Better know nothing than half-know many things.

It is beyond a doubt that all our knowledge begins with experience.

If the facts don't fit the theory, change the facts.

The only true wisdom is in knowing you know nothing.

Courage, conviction and confidence.

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

I am so clever that sometimes I don't understand a single word of what I am saying.

It is better to know how to learn than to know.

To educate a person in the mind but not in morals is to educate a menace to society.

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

All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

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

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

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

Knowing is not enough; we must apply. Willing is not enough; we must do.

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.

Educate the children and it won't be necessary to punish the men.

God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.

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

Books are for people who wish they were somewhere else.