Plutarch’s 8 keys to tranquility of mind for 2023 (or any year, really)

Tranquility, by John William Goddard, 1914. Credit wikimedia commons.

The philosopher Plutarch’s little book On Tranquility of Mind [euthymia] was written some 2000 years ago. It remains ‘ahead of its time’, or rather, a timeless set of observations about why people become unhappy, and the keys to being happier.

For Plutarch, like the Stoics or the Epicureans:

… everyone has within…