One of the things that’s best about Greek culture of the classical era was that it was really optimistic about what humans could do. Yes, the world is shit; yes, the gods are fuckers. But we can and do still achieve amazing things.
This was forgotten by Christians, who after the doctrine of original sin (thanks Augustine!) saw the world as forever broken, and humans as forever corrupt; so naturally we cannot produce anything worthy or good, we can just slog along and wait until we die and get to the perfection of the Kingdom of Heaven.
The Renaissance changed this. One of my favorite historians (Eugen Weber) once remarked that the greatest change in the Renaissance was the “mood.” He was right.
This is Carol Dweck writ large on a civilization; this is the difference between growth-mindset and fixed-mindset.