Res Gestae

And in order to add to the effectiveness of these ordinances, he summoned to the palace the bishops of the Christians, who were of conflicting opinions, and the people, who were also at variance, and politely advised them to lay aside their differences, and each fearlessly and without opposition to observe his own beliefs.

On this he took a firm stand, to the end that, as this freedom increased their dissension, he might afterwards have no fear of a united populace, knowing as he did from experience that no wild beasts are such enemies to mankind as are most of the Christians in their deadly hatred of one another. And he often used to say:

For Marcus, as he was passing through Palestine on his way to Egypt, being often disgusted with the malodorous and rebellious Jews, is reported to have cried: O Marcomanni, O Quadi, O Sarmatians, at last I have found a people more unruly than you.