Lighting Coals

Ἄνθρακας ἀνήφθησαν ἀπ' αὐτοῦ, ἐκ τοῦ Θεοῦ δηλονότι οἱ ἅγιοι. Ἐπειδὴ γὰρ ὁ Θεὸς ἡμῶν πῦρ καταναλίσκον ἐστὶν, οἱ τὸν Θεὸν θεωροῦντες τῇ καθαρότητι, ἄνθρακες εἰκότως προσαγορεύονται, τῇ πρὸς αὐτὸν ἐνώσει πυρούμενοι, καὶ φωστῆρες ἐν κόσμῳ φαινόμενοι.  Ἅγιος Ἰσίδωρος Του Πηλουσιώτου, Βιβλίον Πρῶτον, Ἐπιστολή Β', Δωροθεῳ Μονακῳ Source: Migne PG 78. 181

Burning coals are from Him, 1 that is, manifestly the holy are from God. For since our God is a consuming fire, 2 they who in purity contemplate God are with good reason named coals, on whom he sets His fire, and they shine as lights in the world. 3 Saint Isidore of Pelusium, Book 1, Letter 2, To Dorotheus the Monk 1 Ps 17.9 2 Hebr 12.29 3 cf Philipp 2.15