"Fears. Doubts. Vices. They grip at your soul. Many ponies fall mad under their control. Many commit grievous sins not just to others, but to themselves." He went still, and the light in his milky eyes seemed so far away. Twilight wondered if he had gone into some sort of dormancy, but he spoke again. "Tell me, child. Do you know what it is like to fall from grace? To plummet from a pedestal you yourself have created into complete darkness?"