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

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

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

Suddenly degrees aren't worth anything. Isn't that true? When I was a student, if you had a degree, you had a job. If you didn't have a job it's because you didn't want one. And I didn't want one, frankly.

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

They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

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

Free the child's potential, and you will transform him into the world.

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

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

I cannot live without books.

A thought is an idea in transit.

I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion

The great difficulty in education is to get experience out of ideas.

The man who does not read good books has no advantage over the man who can't read them.

No power and no treasure can outweigh the extension of our knowledge.

I have no special talents. I am only passionately curious.

As we acquire more knowledge, things do not become more comprehensible but more mysterious.

Men are born ignorant, not stupid. They are made stupid by education.

Dare to think for yourself.

Knowledge becomes evil if the aim be not virtuous.