All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

If you're not learning while you're earning, you're cheating yourself out of the better portion of your compensation.

What we know is a drop, what we don't know is an ocean.

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

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

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

Patience is a virtue, and I'm learning patience. It's a tough lesson.

I learned very early the difference between knowing the name of something and knowing something.

Investigate, educate and organize.

Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.

Liberty without Learning is always in peril and Learning without Liberty is always in vain.

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

Education is our passport to the future, for tomorrow belongs to the people who prepare for it today.

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

The first idea the child must acquire is that of the difference between good and evil.

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

The task of a writer is not to solve the problem but to state the problem correctly.

When you know better you do better.

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

It is beyond a doubt that all our knowledge begins with experience.

Dare to think for yourself.