Do not open your mouth to tell me that your mind has convinced you of your right to force my mind. Force and mind are opposites; morality ends where a gun begins. When you declare that men are irrational animals and propose to treat them as such, you define thereby your own character and can no longer claim the sanction of reason -- as no advocate of contradictions can claim it.

-- Ayn Rand
From John Galt's Radio Address in Atlas Shrugged.