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

Education is our passport to the future, for tomorrow belongs to the people who prepare for it today.

The fullness of knowledge only comes through the awareness of ignorance.

The progressive development of man is vitally dependent on invention.

The only true wisdom is in knowing you know nothing.

The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.

No man's knowledge here can go beyond his experience.

Necessity is the mother of invention.

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

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.

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.

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

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

Know what you are talking about.

Knowing others is wisdom, knowing yourself is Enlightenment.

Educate the children and it won't be necessary to punish the men.

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

If the facts don't fit the theory, change the facts.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

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

There is nothing more notable in Socrates than that he found time, when he was an old man, to learn music and dancing, and thought it time well spent.