Full Idea
Perhaps a Greek would experience the way we have delved deeply in uncovering what is human to be an impiety against nature, a shameless act.
Gist of Idea
Greeks might see modern analysis of what is human as impious
Source
Friedrich Nietzsche (Unpublished Notebooks 1882-84 [1883], 34[01])
Book Reference
Nietzsche,Friedrich: 'Fragments from the period of 'Zarathustra' (v 14)', ed/tr. Loeb/Tinsley [Stanford 2019], p.583
A Reaction
Three instances come to mind: Vesalius, Kant and Darwin. That is, anatomical dissection, deep and critical introspection, and natural selection. Human dissection was certainly a Greek taboo.