Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

A child educated only at school is an uneducated child.

Dare to think for yourself.

A witty saying proves nothing.

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.

What is now proved was once only imagined.

Common sense is the collection of prejudices acquired by age eighteen.

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

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

I have just three things to teach: simplicity, patience, compassion. These three are your greatest treasures.

With educated people, I suppose, punctuation is a matter of rule; with me it is a matter of feeling. But I must say I have great respect for the semi-colon; it's a useful little chap.

A cynic is a man who knows the price of everything, and the value of nothing.

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

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

Intelligence plus character-that is the goal of true education.

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

The only good is knowledge and the only evil is ignorance.

The highest activity a human being can attain is learning for understanding, because to understand is to be free.

Imagination is more important than knowledge.

Many much-learned men have no intelligence.

Human behavior flows from three main sources: desire, emotion, and knowledge