Civil liberty is only natural ...

Civil liberty is only natural liberty, modified and secured by the sanctions of civil society.
Civil liberty is only natural liberty, modified and secured by the sanctions of civil society.

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

If the representatives of the people betray their constituents, there is then no recourse left but in the exertion of that original right of self-defense which is paramount to all positive forms of government.
The best we can hope for concerning the people at large is that they be properly armed.
...that standing army can never be formidable (threatening) to the liberties of the people, while there is a large body of citizens, little if at all inferior to them in the use of arms.
This [a state militia system] appears to me the only substitute that can be devised for a standing army, and the best possible security against it, if it should exist.
What plan for the regulation of the militia may be pursued by the national government is impossible to be foreseen...The project of disciplining all the militia of the United States is as futile as it would be injurious if it were capable of being carried into execution... Little more can reasonably be aimed at with the respect to the people at large than to have them properly armed and equipped ; and in order to see that this be not neglected, it will be necessary to assemble them once or twice in the course of a year.