Anyone who becomes master of ...

Anyone who becomes master of a city accustomed to freedom and does not destroy it may expect to be destroyed by it; for such a city may always justify rebellion in the name of liberty and its ancient institutions.
Anyone who becomes master of a city accustomed to freedom and does not destroy it may expect to be destroyed by it; for such a city may always justify rebellion in the name of liberty and its ancient institutions.

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

No enterprise is more likely to succeed than one concealed from the enemy until it is ripe for execution.
Men in general judge more from appearances than from reality. All men have eyes, but few have the gift of penetration.
Men are less hesitant about harming someone who makes himself loved than one who makes himself feared because love is held together by a chain of obligation which, since men are wretched creatures, is broken on every occasion in which their own interests are concerned; but fear is sustained by dread of punishment which will never abandon you.
Many have imagined republics and principalities which have never been seen or known to exist in reality; for how we live is so far removed from how we ought to live, that he who abandons what is done for what ought to be done, will rather bring about his own ruin than his preservation.
A wise prince then...should never be idle in times of peace but should industriously lay up stores of which to avail himself in times of adversity so that when fortune abandons him he may be prepared to resist her blows.