Mímir is a Norse god of wisdom who guards Mímir’s Well beneath Yggdrasil. After his beheading in the Æsir-Vanir war, Odin preserves his head, which continues to offer counsel. Mímir embodies sacrifice for knowledge and the cost of foresight. Poets invoke him as the ultimate sage—his severed head a symbol of enduring wisdom, memory, and the price of understanding fate.

Mímir is the guardian of the Well of Wisdom beneath Yggdrasil, from which Odin drinks after sacrificing an eye. After his beheading in the Æsir–Vanir war, Odin preserves Mímir’s head, which continues to counsel him. Students should recognize Mímir as the embodiment of memory, ancestral wisdom, and the cost of knowledge. His name means "The Rememberer," linking wisdom to recollection. In Völuspá, Mímir’s well is a site of cosmic significance. Poetically, "Mímir’s head" symbolizes preserved lore, while his well represents hidden truth. Mímir’s story is essential for understanding Odin’s character and the Norse valuation of foresight, sacrifice, and oral tradition as vessels of wisdom.