Security can only be achieved through constant change through discarding old ideas that have outlived their usefulness and adapting others to current facts.

Freedom of movement is the very essence of our free society -- once the right to travel is curtailed, all other rights suffer.

Restriction of free thought and free speech is the most dangerous of all subversions. It is the one un-American act that could most easily defeat us.

We are rapidly entering the age of no privacy, where everyone is open to surveillance at all times; where there are no secrets from government.

To be whole and harmonious, man must also know the music of the beaches and the woods. He must find the thing of which he is only an infinitesimal part and nurture it and love it, if he is to live.

The Fifth Amendment is an old friend and a good friend, one of the great landmarks in men's struggle to be free of tyranny, to be decent and civilized.

The liberties of none are safe unless the liberties of all are protected.

Since when have we Americans been expected to bow submissively to authority and speak with awe and reverence to those who represent us?

As night-fall does not come at once, neither does oppression...It is in such twilight that we all must be aware of change in the air - however slight - lest we become victims of the darkness.

Those in power need checks and restraints lest they come to identify the common good for their own tastes and desires, and their continuation in office as essential to the preservation of the nation.

The way to combat noxious ideas is with other ideas. The way to combat falsehoods is with truth.

The quality of beauty lies on how beholder values an object.

Your hardest time will be the most memorable time of your life if you can endure it.

you know, a daydream properly utilized can be the most powerful force in the universe. One need only dream of freedom to begin to break the spell of enslavement.

In a healthy nation there is a kind of dramatic balance between the will of the people and the government, which prevents its degeneration into tyranny.

A mathematician is a magician who converts adjectives into nouns: continuous into continuum, infinite into infinity, infinitesimal into location, 0D into point, 1D into line, curved into geodesic.

I don't keep anything on paper (except within an actual novel in progress, at which point I need a file to keep track of plot threads, characters, and so on).

Why not upset the apple cart? If you don't, the apples will rot anyway.

The great romance of your youth is your best friend at that age.

New York was an idea, I thought, an idea held simultaneously by thirteen million people.

You have eaten a meal dangerously seasoned. [You have laid up a grief in store for yourself.]