From Virgil. The Sybil warns Aeneas to think carefully before he journeys to the underworld –
The way downward is easy from Avernus
Black Dis’s door stands open night and day
Bu to retrace your steps to the air of heaven
There is the trouble, there is the toil…
It has been left to our generation to commit the most primal of all sins, the destruction of the beautiful earth we have been given. Is there any way back?