I am indebted to my father for living, but to my teacher for living well.

Men are born ignorant, not stupid. They are made stupid by education.

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

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

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

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

What is now proved was once only imagined.

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

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

I have no special talents. I am only passionately curious.

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

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

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

The first principle is that you must not fool yourself and you are the easiest person to fool.

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

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

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

Reading without reflecting is like eating without digesting.

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

Education is a system of imposed ignorance.

Industrialize or perish.