Philosophy can be compared to some powders that are so corrosive that, after they have eaten away the infected flesh of a wound, they then devour the living flesh, rot the bones, and penetrate to the very marrow. Philosophy at first refutes errors. But if it is not stopped at this point, it goes on to attack truths. And when it is left on its own, it goes so far that it no longer knows where it is and can find no stopping place.

The antiquity and general acceptance of an opinion is not assurance of its truth.

Compulsion in the literal Sense is maliciously misrepresented, by supposing it authorizes Violences committed against the Truth. The Answer to this; by which it is prov'd, that the literal Sense does in reality authorize the stirring up Persecutions against the Cause of Truth, and that an erroneous Conscience has the same Rights as an enlighten'd Conscience.

I am a good Protestant, and in the full sense of the term, for from the bottom of my soul, I protest against everything that is said, and everything that is done.

So that, were it the purpose of God to produce comets as signs of his wrath it would be true to say that he is quickening a false devotion almost all over the world, increasing the number of pilgrims to Mecca, multiplying the offerings to the most famous impostors, inducing men to build mosques for Mohammedan worship, causing the invention of new superstitions among the dervishes - in a word, stimulating many abominable things which otherwise might not have been.

It is pure illusion to think that an opinion which passes down from century to century, from generation to generation, may not be entirely false.

Properly speaking, history is nothing but the crimes and misfortunes of the human race.