It was given the title Food for the Eagle, after a story he recounted at the end of his speech:
There may be no purpose, but its always good to have a mission. And I know of one fine allegory for an excellent mission should you choose to charge yourself with one: Carlos Castaneda's series of books about his training with a Yaqui indian mystic named Don Juan. There's a lot of controversy about these books being represented as nonfiction. But if you dispense with that representation, and instead take their stories as allegories, they're quite lovely.
At the end of The Eagle's Gift, Don Juan reveals to his student that there's no point to existence. That we're given our brief 70-100 years of consciousness by something the mystics call "The Eagle," named for it's cold, killer demeanor. And when we die, the eagle gobbles our consciousness right back up again.
He explains that the mystics, to give thanks to the eagle for the brief bout of consciousness they're granted, attempt to widen their consciousness as much as possible. This provides a particularly delicious meal for the eagle when it gobbles one up at the end of one's life.
And that, to me, is a fine mission.
If I had to believe in a mythology, I'd like it to be that one. Much more empowering and beautiful than a crucifix and a burning bush.