The supremacy of fire was the idea of Heraclitus. Τὸ πῦρ Θεὸν ὑπειλήφασιν ῞Ιππασος …καὶ ῾Ηράκλειτος. Clem. Alex., Protrep. v. 55. Plutarch has an essay on the comparative use fulness of fire and water.