Their spirit of profanation and impiety arrived at the extreme pitch.

In the Euthyphro, Socrates is awaiting his trial for impiety.

Which shows, Socrates, how little they know what the gods think about piety and impiety.

Euthyphro replies, that 'Piety is what is dear to the gods, and impiety is what is not dear to them.'

I am sure, therefore, that you know the nature of piety and impiety.

There are three causes of impiety, and from each of them spring impieties of two kinds, six in all.

Will not the fear of impiety enable them to conquer that which many who were inferior to them have conquered? '

Death or expulsion was the Athenian penalty for impiety (Telfy).

Magic, impiety, enchantments, are often the effects of a diseased imagination.

I can show that what I say is true, and first I will speak of their impiety.