“A man should always have these two rules in readiness. First, to do only what the reason of your ruling and legislating faculties suggest for the service of man. Second, to change your opinion whenever anyone at hand sets you right and unsettles you in an opinion, but this change of opinion should come only because you are persuaded that something is just or to the public advantage, not because it appears pleasant or increases your reputation.”

Roman emperor and Stoic philosopher

Marcus Aurelius Antoninus was a Roman emperor and Stoic philosopher who ruled from 161 to 180. He was a member of the Nerva Antonine dynasty and is remembered as the last of the rulers later known as the Five Good Emperors, as well as the last emperor of the Pax Romana. He served as Roman consul in 140, 145, and 161. His name is closely associated with Stoic thought and with the late years of the Roman Empire’s long period of relative peace and stability.