Many much-learned men have no intelligence.

Knowing is not enough; we must apply. Willing is not enough; we must do.

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

Science is what we have learned about how to keep from fooling ourselves.

The great difficulty in education is to get experience out of ideas.

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

Know what you are talking about.

Necessity is the mother of invention.

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

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

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

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

The reading of all good books is like conversation with the finest men of past centuries.

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

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

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

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

My weapon is literature

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.

Learning never exhausts the mind.

Real learning comes about when the competitive spirit has ceased.