The Goddess of Spring
The physical explanation of this myth is obvious. Idun, the emblem of vegetation, is forcibly carried away in autumn, when Bragi is absent and the singing of the birds has ceased. The cold wintry wind, Thiassi, detains her in the frozen, barren north, where she cannot thrive, until Loki, the south wind, brings back the seed or the swallow, which are both precursors of the returning spring. The youth, beauty, and strength conferred by Idun are symbolical of Nature’s resurrection in spring after winter’s sleep, when colour and vigour return to the earth, which had grown wrinkled and grey.