"Oh, I understand," Malachite said, snorting with disdain. "I understand so much better than these foals who follow you today. Lest you forget, Luna, I was born a mere century after you became Nightmare Moon. I saw the scars of what you did to the heart of Equestria. And more, I saw what you did to Celestia herself, and the burden that you placed upon her soul, and the pain it caused her every single day! There is no penance for that, no absolution. I accept no judgement or authority from you!" 