“Pure Christianity—the Christianity of the catacombs—is concerned with translating the Christian doctrine into facts. It leads quite simply to the annihilation of mankind. It is merely whole-hearted Bolshevism, under a tinsel of metaphysics.”

Obwohl die Juden auch nicht vor Angriffen auf das Christentum zurückschrecken, werden sie noch von denen geschützt, die das Priesterkleid tragen. Das Christentum der ersten Zeit war ein anderes als das heutige.
Die ersten Christen waren Kämpfer, die ihr Volk von der jüdischen Schmach befreien wollten. Dann stahl sich der Jude in diese Gemeinschaft ein und machte aus dem ursprünglich reinen Christentum ein Gespött der Menschheit. Die ersten Christen waren bereit, für die Erhaltung der christlichen Lehre zu sterben.
04/21/1932, speech in the Hercules Hall in Nuremberg ("Kampf dem Weltfeind", Stürmer publishing house, Nuremberg, 1938)

Letter to James Smith (1822)
1820s
Context: No historical fact is better established, than that the doctrine of one God, pure and uncompounded, was that of the early ages of Christianity … Nor was the unity of the Supreme Being ousted from the Christian creed by the force of reason, but by the sword of civil government, wielded at the will of the fanatic Athanasius. The hocus-pocus phantasm of a God like another Cerberus, with one body and three heads, had its birth and growth in the blood of thousands of martyrs … The Athanasian paradox that one is three, and three but one, is so incomprehensible to the human mind, that no candid man can say he has any idea of it, and how can he believe what presents no idea? He who thinks he does, only deceives himself. He proves, also, that man, once surrendering his reason, has no remaining guard against absurdities the most monstrous, and like a ship without rudder, is the sport of every wind. With such person, gullibility which they call faith, takes the helm from the hand of reason, and the mind becomes a wreck.

Source: Books, Beyond Order (2021), p. 191

"Myth Became Fact" (1944)

Pensées, p. 47, as translated by Mary Ilford in The Bourgeois: Catholicism vs. Capitalism in Eighteenth-Century France (1968), p. 84

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 104.

Source: The Tenant of Wildfell Hall (1848), Ch. XXIII : First weeks of Matrimony; Helen to Arthur

Reflections- The Poetical Works and remains of Henry Kirke White, G. Routledge, London 1835.
Other

On conventional doctrines of Jesus Christ's atonement for sins, in Part II : Opinions Relating to the Doctrine of Atonement, Introduction
An History of the Corruptions of Christianity (1782)