Reading the flames is a very old practice.
From oil lamps to candles, the praying men casted a spell in form of Light to fight the darkness and coldness causing them problems. By the use of prayers and enchantments, the Virtue of Hope or Her evil sister called Delusion tried, through their brother Omen to find a sign of acceptance, deliverance, certainty, relief and success. It is to the fire itself, to its light and warming properties that men, since Zoraoaster’s time, gave their wishes and wills.
Fire has a sound too, like a sentiment. From the bang of the sparkles to the roaring lion’s voice.
Some Mages saw Spirits in flames and called Them Salamanders, the elementals of Fire.
But every God has its own fire, like the Sun passing through his own 12 houses in the sky…
Certa mirabilia semper