The ancient mystery of the "sun at midnight," symbolizes the spiritual light that lies hidden within the dark. The Celts knew that light emerges out of darkness and so their days began at dusk, as if the sun was seeded in the black earth of night.
Mystical wisdom derives from an ardent desire to abandon normal intellectual functions so that divine insight may enlighten this ardor and add to it another fire, much stronger, which lifts the burning soul towards an even deeper wisdom.