EUTHYMIA is an endearing term from ancient Greek philosophy. It closely resembles the modern word "cheerfulness" but does not necessarily mean "happiness" or "pleasure" - it is more akin to serenity or peacefulness. This was the interpretation of Diogenes Laertius on Democritus's use of the term.
Seneca, however, built on this meaning, defining Euthymia as:
“believing in yourself and trusting that you are on the right path, and not being in doubt by following the myriad footpaths of those wandering in every direction.”
This makes Euthymia a highly relevant concept in the modern world, for people in all walks of life. The "myriad footpaths" relates to all the snippets of other's lives we see in the news and on social media today.
"Believing in yourself and trusting that you are on the right path" is a concept that entrepreneurs, especially, would do well to follow. This makes the concept of Euthymia one that highlights the benefits Stoicism to entrepreneurship; two fields that do not always mix well.
Euthymia is a key term for the budding Stoic, especially those in business or high-pressured environments. Remaining tranquil and being able to make good decisions and remain on track despite obstacles and distractions is paramount.