Lux Domini
Then flew one of the seraphims unto me, having a live coal in his hand, which he had taken with the tongs from off the altar:

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Interpretation

In this figurative vision, the temple is thrown open to view, even to the most holy place. The prophet, standing outside the temple, sees the Divine Presence seated on the mercy-seat, raised over the ark of the covenant, between the cherubim and seraphim, and the Divine glory filled the whole temple.

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This thought runs through Isaiah 6:5-8.