Marcus Aurelius ruled the Roman Empire from 161 to 180 CE, through plague, flooding, and near-constant war on the northern frontier. What survives him is not a treatise but a private notebook — the Meditations, written in Greek during military campaigns and never intended for publication.
The notebook is Stoicism practiced rather than argued: reminders to himself about attention, mortality, and the small scope of what any person actually controls. Because the entries were addressed to no reader, they are unusually free of performance — which is much of why they still read clearly nineteen centuries on.
Every Marcus Aurelius line in RiseHush cites its book and passage in the Meditations, in standard scholarly numbering.