When we examine the opinions of men, we find that nothing is more uncommon, than common sense; or, in other words, they lack judgment to discover plain truths, or to reject absurdities, and palpable contradictions.

The inward persuasion that we are free to do, or not to do a thing, is but a mere illusion. If we trace the true principle of our actions, we shall find, that they are always necessary consequences of our volitions and desires, which are never in our power. You think yourself free, because you do what you will; but are you free to will, or not to will; to desire, or not to desire? Are not your volitions and desires necessarily excited by objects or qualities totally independent of you?

It is only by dispelling the clouds and phantoms of religion that we shall discover truth, reason and morality.

The source of man's unhappiness is his ignorance of Nature.

Tolerance and freedom of thought are the veritable antidotes to religious fanaticism.

If the ignorance of nature gave birth to gods, the knowledge of nature is calculated to destroy them.

Religion has ever filled the mind of man with darkness, and kept him in ignorance of his real duties and true interests. It is by dispelling the clouds and phantoms of religion, that we shall discover truth, morality and reason. Religion diverts us from the causes of evils, and from these remedies which nature advocates, far from curing; it only aggravates, perpetuates and multiplies them.