that the holy angels encourage us to pray,
and when we do pray,
they stand beside us with great joy,
praying for us.
But if we grow careless
and admit wicked thoughts,
we greatly vex the angels,
for there they are struggling hard on our behalf,
and we cannot even be bothered
to pray to God for our own benefit
but have scorned their assistance
and dishonored their master and their God.
— Evagrius of Pontus
(Tr. Fr John Anthony McGuckin)