Voltaire

"The institution of religion exists only to keep mankind in order, and to make men merit the goodness of God by their virtue. Everything in a religion which does not tend towards this goal must be considered foreign or dangerous."

"O Truth! pure and sacred virgin, when wilt thou be worthily revered? O Goddess who instructs us, why didst thou put thy palace in a well? When will our learned writers, alike free from bitterness and from flattery, faithfully teach us life?"

"I have received, sir, your new book against the human species, and I thank you for it. You will please people by your manner of telling them the truth about themselves, but you will not alter them. The horrors of that human society—from which in our feebleness and ignorance we expect so many consolations—have never been painted in more striking colours: no one has ever been so witty as you are in trying to turn us into brutes: to read your book makes one long to go on all fours. Since, however, it is now some sixty years since I gave up the practice, I feel that it is unfortunately impossible for me to resume it: I leave this natural habit to those more fit for it than are you and I."

"If there were only one religion in England there would be danger of despotism, if there were two they would cut each other's throats, but there are thirty, and they live in peace and happiness."

"Even in those cities which seem to enjoy the blessings of peace, and where the arts florish, the inhabitants are devoured by envy, cares and anxieties, which are greater plagues than any experienced in a town when it is under siege."

"Ils ne se servent de la pensée que pour autoriser leurs injustices, et n'emploient les paroles que pour déguiser leurs pensées."

"The reasonable worship of a just God who punishes and rewards, would undoubtedly contribute to the happiness of men; but when that salutary knowledge of a just God is disfigured by absurd lies and dangerous superstitions, then the remedy turns to poison."