Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

Never help a child with a task at which he feels he can succeed.

The highest result of education is tolerance.

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

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

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

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

The books that the world calls immoral are books that show the world its own shame.

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

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

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

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

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

When you know better you do better.

Education is the most powerful weapon which you can use to change the world.

Education is the ability to listen to almost anything without losing your temper or your self-confidence.

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

Real learning comes about when the competitive spirit has ceased.

A thought is an idea in transit.

Know what you are talking about.