It is a crime to put a Roman ...

It is a crime to put a Roman citizen in chains, it is an enormity to flog one, sheer murder to slay one: what, then, shall I say of crucifixion? It is impossible to find the word for such an abomination.
It is a crime to put a Roman citizen in chains, it is an enormity to flog one, sheer murder to slay one: what, then, shall I say of crucifixion? It is impossible to find the word for such an abomination.

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

Let arms give place to the robe, and the laurel of the warriors yield to the tongue of the orator.
Philosophy is the true mother of science.
Such are a well regulated militia, composed of the freeholders, citizen and husbandman, who take up arms to preserve their property, as individuals, and their rights as freemen.
This wine is forty years old. It certainly doesn't show its age.
If you would abolish covetousness, you must abolish its mother, profusion.