He warns himself to avoid dyeing his character with the royal purple and turning into a Caesar, instead aspiring to remain true to his philosophical principles. He (twice) reminds himself that his purple imperial robes are mere sheep’s wool dyed in fermented shellfish mucus. He tells himself to dye his mind with the wisdom of philosophical precepts handed down from his Stoic teachers. Marcus Aurelius, indeed, viewed himself as a Stoic first and an emperor second.
