A sign of a celebrity is often that his name is worth more than his services.

The greatest obstacle to discovery is not ignorance - it is the illusion of knowledge.

Some are born great, some achieve greatness, and some hire public relations officers.

The traveler was active; he went strenuously in search of people, of adventure, of experience. The tourist is passive; he expects interesting things to happen to him. He goes 'sight-seeing.'

Human models are more vivid and more persuasive than explicit moral commands.

The courage to imagine the otherwise is our greatest resource, adding color and suspense to all our life.

Freedom means the opportunity to be what we never thought we would be.

I write to discover what I think.

Knowledge is not simply another commodity. On the contrary. Knowledge is never used up. It increases by diffusion and grows by dispersion.

Technology is so much fun but we can drown in our technology. The fog of information can drive out knowledge.

We suffer primarily not from our vices or our weaknesses, but from our illusions. We are haunted, not by reality, but by those images we have put in their place.

Service to others in their time of need is a privilege and an honor.

Think of an economy where people could be an artist or a photographer or a writer without worrying about keeping their day job in order to have health insurance.

Americans think Soviets are so grim. I want them to see that they can smile.

I sat down one night and wrote the line rock, rock, rock everybody.

But poets were not considered dangerous and they were advised to exercise self-censorship. At most, poets were requested not to write at all. I took advantage of this negative liberty.

Brains are an asset to the woman in love who's smart enough to hide 'em.

The forces of adversaries are more diminished by the loss of those who flee than of those who are killed.

Oppression is something that one group of people commits against another group specifically because of a threatening characteristic shared by the latter group.

Governments have a legitimate concern with slowing population growth. But often this has been attempted with little concern for the individuals most affected.

I don't lead a particularly exciting life away from work.