To discover the true principles of morality, men have no need of theology, of revelation, or of gods. They need but common sense. They have only to look within themselves, to reflect upon their own nature, to consult their obvious interests, to consider the object of society and of each of the members who compose it, and they will easily understand that virtue is an advantage, and that vice is an injury to beings of the species.

... inventions and purely human institutions.

If God is incomprehensible to man, it would seem rational never to think of Him at all.

To claim that the souls of men will be happy or unhappy after the death of the body, is to pretend that man will be able to see without eyes, to hear without ears, to taste without a palate, to smell without a nose, and to feel without hands and without skin. Nations who believe themselves very rational, adopt, nevertheless, such ideas.

Think hard about the reasons for believing and not believing, what your religion teaches you and demands so inexorably that you believe. I am convinced that if you follow closely the natural light of your spirit, you will see ... that all the religions in the world are only human inventions and that everything your religion teaches you and forces you to believe as supernatural and divine is at heart only error, lie, illusion and trickery.

I would like the last of the kings to be strangled by the guts of the last priest.

To discover the true principles of morality, men have no need of theology, of revelation, or of gods. They need but common sense. They have only to look within themselves, to reflect upon their own nature, to consult their obvious interests, to consider the object of society and of each of the members who compose it, and they will easily understand that virtue is an advantage, and that vice is an injury to beings of the species.