Front Page Titles (by Subject) LIBERTY OF OPINION. - The Works of Voltaire, Vol. VI (Philosophical Dictionary Part 4)
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LIBERTY OF OPINION. - Voltaire, The Works of Voltaire, Vol. VI (Philosophical Dictionary Part 4) 
The Works of Voltaire. A Contemporary Version. A Critique and Biography by John Morley, notes by Tobias Smollett, trans. William F. Fleming (New York: E.R. DuMont, 1901). In 21 vols. Vol. VI.
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LIBERTY OF OPINION.
Towards the year 1707, the time at which the English gained the battle of Saragossa, protected Portugal, and for some time gave a king to Spain, Lord Boldmind, a general officer who had been wounded, was at the waters of Barèges. He there met with Count Medroso, who having fallen from his horse behind the baggage, at a league and a half from the field of battle, also came to take the waters. He was a familiar of the Inquisition, while Lord Boldmind was only familiar in conversation. One day after their wine, he held this dialogue with Medroso:
—It is true; but I would rather be their servant than their victim, and I have preferred the unhappiness of burning my neighbor to that of being roasted myself.)
—What would you have? It is not permitted us either to write, speak, or even to think. If we speak, it is easy to misinterpret our words, and still more our writings; and as we cannot be condemned in an auto-da-fé for our secret thoughts, we are menaced with being burned eternally by the order of God himself, if we think not like the Jacobins. They have persuaded the government that if we had common sense the entire state would be in combustion, and the nation become the most miserable upon earth.)
—Who is this Tullius Cicero? I have never heard his name pronounced at St. Hermandad.)
—I know none of them; but I am told that the Catholic religion, Biscayan and Roman, is lost if we begin to think.)
—No; but it may be reduced to very little; and it is through having thought, that Sweden, Denmark, all your island, and the half of Germany groan under the frightful misfortune of not being subjects of the pope. It is even said that, if men continue to follow their false lights, they will soon have merely the simple adoration of God and of virtue. If the gates of hell ever prevail so far, what will become of the holy office?)
—I understand you not.)
—You are a man, and that is sufficient.)
—You have only to teach yourself to think; you are born with a mind, you are a bird in the cage of the Inquisition, the holy office has clipped your wings, but they will grow again. He who knows not geometry can learn it: all men can instruct themselves. Is it not shameful to put your soul into the hands of those to whom you would not intrust your money? Dare to think for yourself.)
—Quite the contrary. When we assist at a spectacle, every one freely tells his opinion of it, and the public peace is not thereby disturbed; but if some insolent protector of a poet would force all people of taste to proclaim that to be good which appears to them bad, blows would follow, and the two parties would throw apples of discord at one another’s heads, as once happened at London. Tyrants over mind have caused a part of the misfortunes of the world. We are happy in England only because every one freely enjoys the right of speaking his opinion.)
—You are tranquil, but you are not happy: it is the tranquillity of galley-slaves, who row in cadence and in silence.)
—Yes, and I would deliver it.)
—But if I find myself well at the galleys?
—Why, then, you deserve to be there.