1. The Sacrificial Ordeal of Knowledge
In stanzas 138–145 of the Hávamál, Odin recounts his ultimate epistemological ordeal: "I know that I hung on a windswept tree nine long nights, wounded with a spear, dedicated to Odin, myself to myself." With no bread to sustain him and no horn of mead offered, he peered downward into non-being until the runes revealed their secrets, which he seized with a mighty cry.