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

What is freedom of expression? Without the freedom to offend, it ceases to exist.

What is now proved was once only imagined.

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

No power and no treasure can outweigh the extension of our knowledge.

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

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

There is one quality which one must possess to win, and that is definiteness of purpose, the knowledge of what one wants, and a burning desire to possess it.

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

Seek knowledge from the cradle to the grave.

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

If you're teaching today what you were teaching five years ago, either the field is dead or you are.

Education is the kindling of a flame, not the filling of a vessel.

The fullness of knowledge only comes through the awareness of ignorance.

It is better to know how to learn than to know.

Any sufficiently advanced technology is indistinguishable from magic.

Better know nothing than half-know many things.

Dare to think for yourself.

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

Books are for people who wish they were somewhere else.

I do not know how to teach philosophy without becoming a disturber of the peace.