What is now proved was once only imagined.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

My weapon is literature

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

Courage, conviction and confidence.

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

Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

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.

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

One test of the correctness of educational procedure is the happiness of the child.

The only good is knowledge and the only evil is ignorance.

The direction in which education starts a man will determine his future in life

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

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

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

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

I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion

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

A little knowledge is a dangerous thing. So is a lot.

Just because I don't care doesn't mean I don't understand.

Better know nothing than half-know many things.