Skepticism, like chastity, ...

Skepticism, like chastity, should not be relinquished too readily.
Skepticism, like chastity, should not be relinquished too readily.

More phrases

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

America is a young country with an old mentality.
One's friends are that part of the human race with which one can be human.
Friendship is almost always the union of a part of one mind with the part of another; people are friends in spots.
Those who cannot learn from history are doomed to repeat it.
Saints cannot arise where there have been no warriors, nor philosophers where a prying beast does not remain hidden in the depths.