Satan, issuing orders at nightfall to his foul precurrers, was rumoured to dispatch to capital cities only one junior fiend. This solitary demon, the legend continues, sleeps at his post. There is no work for him; the battle was long ago won. But monasteries, those scattered danger points, become the chief objectives of nocturnal flight; the sky fills with the beat of sable wings as phalanx after phalanx streams to the attack, and the darkness crepitates with the splintering of a myriad lances against the masonry of asceticism. Piety has always been singled out for the hardest onslaught of hellish aggression. The empty slopes of the wilderness became the lists for an unprecedented single combat, lasting forty days and nights, between the leaders of either faction; when the Thebaid filled up with hermits, their presence at once attracted a detachment of demons, and round the solitary pillar of St. Symeon the Stylite, the Powers of Darkness assembled and spun like swarming wasps.

— Patrick Leigh Fermor, A Time to Keep Silence