Sinking back to the human level

"Whenever you sink back from engagement with the divine to the human level, your sight will go dim, just like the eyes of those who return from bright sunlight to dense shadow".

- Seneca, Natural questions 3 Pref 11

The essence of Stoicism is the claim that the only path to happiness lies in living according to nature. To understand what that means for a human being is what Seneca calls “engagement with the divine” (divinorum conversatio) - since god is nature in Stoicism. Fully understanding what it means and acting accordingly is to be wise. A wise person will by definition never act contrary to his or her understanding of living according to nature. Foolishness - by definition - is to lose sight of what it means for a human being to live according to nature. For instance by overestimating one's understanding of what it means for a human being to live according to nature. That is to sink back from engagement with the divine to the human level.