“Those who can make you believe absurdities can make you commit atrocities.” — Voltaire · Questions sur les miracles, 1765
“It is dangerous to be right in matters on which the established authorities are wrong.” — Voltaire · The Age of Louis XIV, 1752
“Doubt is not a pleasant condition, but certainty is an absurd one.” — Voltaire · Letter to Frederick the Great, 1767
“Freethinkers are those who are willing to use their minds without prejudice and without fearing to understand things that clash with their own customs, privileges, or beliefs.” — Leo Tolstoy
“A man can live and be healthy without killing animals for food; therefore, if he eats meat, he participates in taking animal life merely for the sake of his appetite. And to act so is immoral.” — Leo Tolstoy · The First Step, 1892