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There must be no barriers to freedom of inquiry ... There is no place for dogma in science. The scientist is free, and must be free to ask any question, to doubt any assertion, to seek for any evidence, to correct any errors. Our political life is also predicated on openness. We know that the only way to avoid error is to detect it and that the only way to detect it is to be free to inquire. And we know that as long as men are free to ask what they must, free to say what they think, free to think what they will, freedom can never be lost, and science can never regress.
--
As quoted in "J. Robert Oppenheimer" by L. Barnett, in Life, Vol. 7, No. 9, International Edition (24 October 1949), p.58; sometimes a partial version (the final sentence) is misattributed to Marcel Proust.

 

J. Robert Oppenheimer

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Do we call this the land of the free? What is it to be free from King George and continue the slaves of King Prejudice? What is it to be born free and not to live free? What is the value of any political freedom, but as a means to moral freedom? Is it a freedom to be slaves, or a freedom to be free, of which we boast? We are a nation of politicians, concerned about the outmost defences only of freedom. It is our children's children who may perchance be really free.

 

Henry David Thoreau

 

I am a Canadian, a free Canadian, free to speak without fear, free to worship God in my own way, free to stand for what I think right, free to oppose what I believe wrong, free to choose those who shall govern my country. This heritage of freedom I pledge to uphold for myself and all mankind.

 

John Diefenbaker

 

Let me be a free man, free to travel, free to stop, free to work, free to trade where I choose, free to choose my own teachers, free to follow the religion of my fathers, free to talk, think and act for myself — and I will obey every law or submit to the penalty.

 

Joseph (Chief)

 

You waste the attention of your eyes,
the glittering labour of your hands,
and knead the dough enough for dozens of loaves
of which you'll taste not a morsel;
you are free to slave for others—
you are free to make the rich richer.
The moment you're born
they plant around you
mills that grind lies
lies to last you a lifetime.
You keep thinking in your great freedom
a finger on your temple
free to have a free conscience.
Your head bent as if half-cut from the nape,
your arms long, hanging,
your saunter about in your great freedom:
you're free
with the freedom of being unemployed.
You love your country
as the nearest, most precious thing to you.
But one day, for example,
they may endorse it over to America,
and you, too, with your great freedom—
you have the freedom to become an air-base.
You may proclaim that one must live
not as a tool, a number or a link
but as a human being—
then at once they handcuff your wrists.
You are free to be arrested, imprisoned
and even hanged.
There's neither an iron, wooden
nor a tulle curtain
in your life;
there's no need to choose freedom:
you are free.
But this kind of freedom
is a sad affair under the stars.

 

Nazim Hikmet

 

We do not believe any group of men adequate enough or wise enough to operate without scrutiny or without criticism. We know that the only way to avoid error is to detect it, that the only way to detect it is to be free to enquire. We know that the wages of secrecy are corruption. We know that in secrecy error, undetected, will flourish and subvert.

 

J. Robert Oppenheimer