You can never learn less, you can only learn more.

Better know nothing than half-know many things.

My weapon is literature

The only true wisdom is in knowing you know nothing.

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

The knowledge of all things is possible

I prefer the company of peasants because they have not been educated sufficiently to reason incorrectly.

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

I am a part of everything that I have read.

The real solution lies in a world in which charity will have become unnecessary.

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

What we know is a drop, what we don't know is an ocean.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

What is now proved was once only imagined.

If help and salvation are to come, they can only come from the children, for the children are the makers of men.

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

Study without desire spoils the memory, and it retains nothing that it takes in.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

A thought is an idea in transit.

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

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.