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.

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.

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

There is not less wit nor invention in applying rightly a thought one finds in a book, than in being the first author of that thought. Cardinal du Perron has been heard to say that the happy application of a verse of Virgil has deserved a talent.

In matters of religion, it is very easy to deceive a man and very hard to undeceive him.

It is only common prejudice that induces us to believe that atheism is a fearful state.

The movement of comets is part of the ordinary works of nature which, without regard to the happiness or misery of mankind, are transported from one part of the heavens to another by virtue of the general laws of motion.