Herodian, History of the Empire From the Death of Marcus…
“ For, just as it is unfair to initiate wrong actions, so also it is cowardly to make no defense against unjust treatment. Now when we took the field against Niger, we had reasons for our hostility, not entirely logical, perhaps, but inevitable. We did not hate him because he had seized the empire after it was already ours, but rather each one of us, motivated by an equal desire for glory, sought the empire for himself alone, when it was still in dispute and lay prostrate before all. ”
