The painting showed the Emperor, ascendant above all, catching the spinning constellations in his outstretched hand. The stars.’ Horus said. 'See, there? How he scoops them up? The zodiacs swirl into his grasp like fireflies. The stars are mankind's birthright. That's what he told me. That's one of the first things he told me when we met. I was like a child then, raised up from nothing. He set me at his side, and pointed to the heavens. Those points of light, he said, are what we have been waiting generations to master. Imagine, Horus, every one a human culture, every one a realm of beauty and magnificence, free from strife, free from war, free from bloodshed and the tyrannous oppression of alien overlords. Make no mistake, he said, and they will be ours.’ Horus slowly traced his fingers across the whorl of painted stars until his hand met the image of the Emperor's hand.
(Dan Abnett, "Horus Rising")