16 What will you answer your brother? Will he not say to you, “I did not feel that I was overcome, because I left you as Emperor; I did not grieve at dying, because I had you as my heir; I did not mourn at leaving my imperial command, because I believed that my commands, especially those concerning divine religion, would endure through all ages. I had set up these memorials of piety and virtue, I offered up these spoils gained from the world, these trophies of victory over the devil, these I offered up as gained from the enemy of all, and in them is eternal victory.
What more could my enemy take away from me? You have abrogated my decrees, which so far he who took up arms against me did not do. Now do I receive a more terrible wound in that my decrees are condemned by my brother. My better part is endangered by you, that was but the death of my body, this of my reputation. Now is my power annulled, and what is harder, annulled by my own family, and that is annulled, which even my enemies spoke well of in me. If you consented of your own free will, you have condemned the faith which was mine; if you yielded unwillingly, you have betrayed your own. So, too, which is more serious, I am in danger in your person.”
Source: Letters (New Advent)