666 on freedom of thought
De Libertate Mentis (from Liber Aleph)
There shall be no property in Human Thought. Let each think as he will concerning the Universe; but let none seek to impose that Thought upon another by any Threat of Penalty in this World or any other World.... I charge thee therefore that thou permit none to tyrannize any other in Thought, or to threaten, or in any other wise to blaspheme the great Liberty of Our Father the Sun in the Grand Cosmos, or of His Viceregent in the Little.
There shall be no property in Human Thought. Let each think as he will concerning the Universe; but let none seek to impose that Thought upon another by any Threat of Penalty in this World or any other World.... I charge thee therefore that thou permit none to tyrannize any other in Thought, or to threaten, or in any other wise to blaspheme the great Liberty of Our Father the Sun in the Grand Cosmos, or of His Viceregent in the Little.