Don't worry that children never listen to you; worry that they are always watching you.

Real knowledge is to know the extent of one's ignorance.

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.

Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.

Education is the best friend. An educated person is respected everywhere. Education beats the beauty and the youth.

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

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

A thought is an idea in transit.

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

It is possible to fly without motors, but not without knowledge and skill.

I cannot teach anybody anything. I can only make them think

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

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

The whole of science is nothing more than a refinement of everyday thinking.

Civilization is a race between disaster and education.

Books are as useful to a stupid person as a mirror is useful to a blind person.

Many much-learned men have no intelligence.

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.

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

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

God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.