City a Desert Episode 672. St. Hesychios the Priest. The Philokalia Volume One:

201. Just as the angels do not concern themselves with property and money, so those who have purified the soul's vision and who have attained the state of holiness are not troubled by the evil ploys of the demons. And just as the richness that comes from moving closer to God is evident in the angels, so love and intense longing for God is evident in those who have become angelic and gaze upwards towards the divine. Moreover, because the taste of the divine and the ecstasy of desire make their longing ever more intense and insatiable as they ascend, they do not stop until they reach the Seraphim: nor do they rest from their watchfulness of intellect and the intense longing of their aspiration until they have become angels in Christ Jesus our Lord.