The ability to observe without evaluating is the highest form of intelligence.

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

When you know better you do better.

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

In mathematics you don't understand things. You just get used to them.

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

What is now proved was once only imagined.

Dare to think for yourself.

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

Human behavior flows from three main sources: desire, emotion, and knowledge

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

Study without desire spoils the memory, and it retains nothing that it takes in.

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.

An investment in knowledge pays the best interest.

Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.

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

Books are for people who wish they were somewhere else.

To read is to fly: it is to soar to a point of vantage which gives a view over wide terrains of history, human variety, ideas, shared experience and the fruits of many inquiries.

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

If there were no bad people, there would be no good lawyers.

The whole of science is nothing more than a refinement of everyday thinking.