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

A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.

Opinion is the medium between knowledge and ignorance.

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.

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

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

Suddenly degrees aren't worth anything. Isn't that true? When I was a student, if you had a degree, you had a job. If you didn't have a job it's because you didn't want one. And I didn't want one, frankly.

Courage, conviction and confidence.

The books that the world calls immoral are books that show the world its own shame.

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

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

Learning never exhausts the mind.

What is now proved was once only imagined.

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

The deepest sin against the human mind is to believe things without evidence.

I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.

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

It is possible to fly without motors, but not without knowledge and skill.

Knowledge becomes evil if the aim be not virtuous.

Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is the most important.

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