Hubris is a damnable affliction.
The Greeks warned of it via the medium of theatre.
Therefore, it was fitting that the hubris of Celtic was played out in a city that is currently hosting the largest dramatic festival on the planet this month.
I doubt there are few productions at the Edinburgh Festival that would tell this ancient truth as well as what was witnessed at Tynecastle on Saturday.
It is the sort of fixture that John McGinn would have relished and the physicality would not have caused him to hesitate or retreat.
Of course, Tynecastle is always a hostile environment for Celtic.
On Friday a Celtic insider laid out a fascinating scenario for me.
He told me that the new deal with Dafabet was beyond anything that the Parkhead club had ever been able to attract.
His view, not mine, was that it was such a victory that it might have re-awakened the self-belief of someone who really should have no input into the football department.
If you will, the hubris of the Heated Driveway had been in remission since the end days of the Ronny Deila debacle.
Once Brendan was in the building it was clear who was in full charge of football matters.
Then Celtic struck sponsorship gold this summer and old demons were perhaps re-awakened.
£70m over seven years is a remarkable coup for the business side of the champions.
Ironically it was precisely the on-field dominance that was delivered by Brendan Rodgers that had put the club in such a strong negotiating position with Dafabet.
However, my Parkhead insider opined that the Dafabet deal was such a personal victory for the Chief Executive that it had reignited his ambitions to, once more, be the untitled director of football.
An interesting theory.
What is not theoretical is that Celtic will play a match in Athens tomorrow with a minimum of €40m at stake.
That Rodgers will have to navigate this tie with a makeshift defence is not his fault.
He wanted players in during the close season.
Moreover, additions who were available and within the budget.
That clearly didn’t happen and the fault is not with the Irishman.
If a Greek tragedy unfolds tomorrow night in Athens then I would not be surprised if they raise a glass to Peter in the Blue Room.
Dermot has a decision to make.