I am in the utmost perplexity, yand have wished a hundred times, that if there is a A God, nature would manifest him without ambiguity, and that if there is not, every imaginary sign of his existence might vanish : in short, let nature speak distinctly, or be totally silent, and I shall know what course to take.

Eloquence is a way of saying things in such a way, first, that those to whom we speak may listen to them without pain and with pleasure, and second, that they feel themselves interested, so that self-love leads them more willingly to reflection upon it.

The two principles of truth, reason and senses, are not only both not genuine, but are engaged in mutual deception. The senses deceive reason through false appearances, and the senses are disturbed by passions, which produce false impressions.

All the dignity of man consists in thought. Thought is therefore by its nature a wonderful and incomparable thing. It must have strange defects to be contemptible. But it has such, so that nothing is more ridiculous. How great it is in its nature! How vile it is in its defects! But what is this thought? How foolish it is!

Atheism shows strength of mind, but only to a certain degree.

We like security: we like the pope to be infallible in matters of faith, and grave doctors to be so in moral questions so that we can feel reassured.

The last thing that we find in making a book is to know what we must put first.