neither to toss about beyond measure (metrion) as if at an entirely novel and spontaneous disaster, nor to be emotionless (apatheia), as if nothing painful had happened, but to choose the mean (to meson) rather than the extremes (akra), and try to be moderate in emotion (metriopathein).
Philo’s formulation presents metriopatheia as a deliberate middle path between unrestrained grief and emotionless indifference, grounded in the Aristotelian logic of the mean.
, Emotion and Peace of Mind: From Stoic Agitation to Christian Temptation, 2000thesis