Dare to think for yourself.

Imagination is the source of every form of human achievement. And it's the one thing that I believe we are systematically jeopardizing in the way we educate our children and ourselves.

The most savage controversies are those about matters as to which there is no good evidence either way.

An investment in knowledge pays the best interest.

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

Knowledge, Action, Devotion are complementary to each other.

I decided to teach because I think that any person who studies philosophy has to be involved actively.

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

Physics is like sex: sure, it may give some practical results, but that's not why we do it.

Education is a system of imposed ignorance.

There is no authority who decides what is a good idea.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

God created man in His own image, says the Bible; philosophers reverse the process: they create God in theirs.

Make it a rule never to give a child a book you would not read yourself.

My alma mater was books, a good library.... I could spend the rest of my life reading, just satisfying my curiosity.

Real learning comes about when the competitive spirit has ceased.

Evil being the root of mystery, pain is the root of knowledge.

They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.

A thought is an idea in transit.

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

Don't learn to do, but learn in doing.