The latest complete audio commentary of my Stoic Meditations series is dedicated to Seneca’s On Tranquillity of Mind, inspired by Democritus’ treaty “on cheerfulness,” written around 400 BCE. Seneca in turn inspired Plutarch to write a work on the same subject.
It is often assumed that the work was written about 60 CE, when Seneca’s political influence was waning, but historians are not sure about this. It is, of course, written from a Stoic perspective.
It is more typical of a human to laugh down life than to bewail it. — 15.2
My audio commentary runs for 24 episodes.
Massimo Pigliucci 
Thank you for your wonderful insightful content. So much enjoyed and valued
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