The more I read, the more I acquire, the more certain I am that I know nothing.

It isn't what we don't know that gives us trouble, it's what we know that ain't so.

Learning never exhausts the mind.

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

Most people have never learned that one of the main aims in life is to enjoy it.

Science is what we have learned about how to keep from fooling ourselves.

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

No man's knowledge here can go beyond his experience.

The progressive development of man is vitally dependent on invention.

I learned very early the difference between knowing the name of something and knowing something.

Education is an ornament for the prosperous, a refuge for the unfortunate.

Show me a family of readers, and I will show you the people who move the world.

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

Science is not only a disciple of reason but, also, one of romance and passion.

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

All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.

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

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

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

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