The Fire Chapel

As they were speaking of these things, a flaming arrow shot through the window before their eyes and lit all the lamps that were positioned before the altar. Then it shot back out the way it had come. But the precious light remained in the lamps. “Who puts out the lamps in the morning?” asked blessed Brendan, to which the holy father replied, “Come and see the mystery of the thing yourself. Do you see the candles burning in the middle of the lampstands? They never burn down, nor do they have any ash, for their light is spiritual.” St. Brendan said, “How can an immaterial light burn physically in a material object?” “Have you not read of the burning bush of Mt. Sinai?” the old man replied. “The bush itself was not touched by fire.”

-- from “The Voyage of St. Brendan”