“It was even possible for the most venerated patriarchs of the Church, like St. Augustine and St. Thomas Aquinas, to conclude that heretics should be tortured (Augustine) or killed (Aquinas). Martin Luther and John Calvin advocated the wholesale murder of heretics, apostates, Jews, and witches. You are, of course, free to interpret the Bible differently—though isn't it amazing that you have succeeded in discerning the true teachings of Christianity, while the most influential thinkers in the history of your faith failed?”

Source: The Outsider (1956), p. 292

Mont Saint Michel and Chartres (1904)

Preface; Cruelty's Excuses
1930s, On the Rocks (1933)

In reaction to statements by Maurice O'Connor Drury who expressed disapproval of depictions of an ancient Egyptian god with an erect phallus, in "Conversations with Wittgenstein" as quoted in Leading a Human Life: Wittgenstein, Intentionality, and Romanticism (1997) by Richard Thomas Eldridge, p. 130
Attributed from posthumous publications

Source: The Sword or the Cross, Which Should be the Weapon of the Christian Militant? (1921), Ch.6 p. 95
Context: For a disciple of Jesus, in each case the decision hinges upon the answer to the question, Is it Christian? Is it a thing that Jesus could do without sin? Is it in harmony with his teaching and desires? Can it be followed without violating his way of life? Is it such that he can use it, sanction it and bless it? If the devout monk had decided the question solely upon these grounds, he should not have used torture to conquer the heretic, the judge should not have used the stake to silence witches, the politician should not adopt the evil practices of his opponent, and if the Christian citizen uses this same test, he should not, in my opinion, use the sword in resisting the military despot.

Broken Lights p. 90-91 Diaries 1951-1952.

On leadership and the relation between madness, heresy, and genius.
Ideas as Art (2006)

Source: The Walking Drum (1984), Ch. 31
Context: How much could I tell them? How much dared I tell them? What was the point at which acceptance would begin to yield to doubt? For the mind must be prepared for knowledge as one prepares a field for planting, and a discovery made too soon is no better than a discovery not made at all. Had I been a Christian, I would undoubtedly have been considered a heretic, for what the world has always needed is more heretics and less authority. There can be no order or progress without discipline, but authority can be quite different. Authority, in this world in which I moved, implied belief in and acceptance of a dogma, and dogma is invariably wrong, as knowledge is always in a state of transition. The radical ideas of today are often the conservative policies of tomorrow, and dogma is left protesting by the wayside.  Each generation has a group that wishes to impose a static pattern on events, a static pattern that would hold society forever immobile in a position favorable to the group in question. <!--
Much of the conflict in the minds and arguments of those about me was due to a basic conflict between religious doctrines based primarily upon faith, and Greek philosophy, which was an attempt to interpret experience by reason. Or so it seemed to me, a man with much to learn.

Aurea Dicta VI, p. 4.
The Rod, the Root, and the Flower (1895)