At all times, in every century, every age, there has been such a connection between despotism and religion that it is infinitely apparent and demonstrated a thousand times over, that in destroying one, the other must be undermined, for the simple reason that the first will always put the law into the service of the second.

The primary and most beautiful of nature's qualities is motion

The mechanism that directs government cannot be virtuous, because it is impossible to thwart every crime, to protect oneself from every criminal without being criminal too; that which directs corrupt mankind must be corrupt itself; and it will never be by means of virtue, virtue being inert and passive, that you will maintain control over vice, which is ever active: the governor must be more energetic than the governed.

No kind of sensation is keener and more active than that of pain its impressions are unmistakable.

If the objects who serve us feel ecstacy, they are much more often concerned with themselves than with us, and our own enjoyment is consequently impaired. The idea of seeing another person experience the same pleasure reduces one to a kind of equality which spoils the unutterable charms that come from despotism.

Anything beyond the limits and grasp of the human mind is either illusion or futility; and because your god having to be one or the other of the two, in the first instance I should be mad to believe in him, and in the second a fool.

You say that my way of thinking cannot be tolerated? What of it? The man who alters his way of thinking to suit othere is a fool. My way of thinking is the result of my reflections. It is part of my inner being,the way I am made. I do not contradict them, and would not even if I wished to. For my system, which you disapprove of is also my greatest comfort in life, the source of all my happiness -it means more to me than my life itself.