“The world is kept alive only by heretics: the heretic Christ, the heretic Copernicus, the heretic Tolstoy. Our symbol of faith is heresy. (“Tomorrow”)”
“All the heroes of tomorrow are the heretics of today.”
“If we have no heretics we must invent them, for heresy is essential to health and growth.”
“Thieves, Heretics, and Whores”
“To be a heretic to-day is almost a human obligation.”
“One century's saint is the next century's heretic ... and one century's heretic is the next century's saint. It is as well to think long and calmly before affixing either name to any man.”