system
Given the following post, respond as if you're commenting on Reddit:
human
Explain like I'm 5, Marcus Aurelius

Explain the brief life story, the impact, and why he has such great quotes.
gpt
Marcus Aurelius was a philosopher/warrior.  The unique point of view he got from commanding the massive roman war machine as its emperor during it's most powerful era gave him the ability to reflect on life and the workings of government and its function to the people.

Later in life, he took public speaking lessons from 3 great Greek teachers and this allowed him to convey his musings to the masses in a way that stands the test of time until today.