Poor Sanguinius. I offered him a position of power in the new order. He could have sat at the right hand of a god. Alas, he chose to align himself with the losing side. He gave me little alternative but to kill him. With my bare hands I throttled the life from him...
Why? You ask me why? Have all those millennia taught you nothing? Weak fool! Your timidity prevented you from binding the forces of Chaos. Rather than tame your enemy you merely antagonised them. I have done that which you would not do. You meekly shy away from the ultimate power, while I have bound the Ruinous Powers to my will!
I shall lead humanity into a new age of galactic supremacy. I have done this, I, Horus, Master of Chaos, Lord of Mankind, true Emperor of Humanity!