The basic test of freedom is ...

The basic test of freedom is perhaps less in what we are free to do than in what we are free not to do.
The basic test of freedom is perhaps less in what we are free to do than in what we are free not to do.

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All the great things are simple, and many can be expressed in a single word: freedom, justice, honor, duty, mercy, hope.
I know but one freedom and that is the freedom of the mind.
 Antoine de Saint-Exupéry
Freedom is not worth having if it does not connote freedom to err.
The amount of happiness that you have depends on the amount of freedom you have in your heart.
 Thích Nhất Hạnh
Without freedom of thought, there can be no such thing as wisdom - and no such thing as public liberty without freedom of speech.

Quotes from the same author

In times of change, learners inherit the earth, while the learned find themselves beautifully equipped to deal with a world that no longer exists.
Man's chief goal in life is still to become and stay human, and defend his achievements against the encroachment of nature.
The Paleolithic hunters who painted the unsurpassed animal murals on the ceiling of the cave at Altamira had only rudimentary tools. Art is older than production for use, and play older than work. Man was shaped less by what he had to do than by what he did in playful moments. It is the child in man that is the source of his uniqueness and creativeness, and the playground is the optimal milieu for the unfolding of his capacities.
You cannot gauge the intelligence of an American by talking with him; you must work with him. The American polishes and refines his way of doing things-even the most commonplace-the way the French of the 17th century polished their maxims.
Craving, not having, is the mother of a reckless giving of oneself.