The peoples of the Age of Obsidian believed that all things were immortal through change.
- Life-Death-Rebirth: The simplest way of seeing that cycles was in how they understood the animal world. Each spring, Mother Nature created all of the new life. Paleolithic and Mesolithic tribes would kill what they needed, respecting and thanking the animals for their sacrifice, but knowing full well that they would be reborn again in the next spring just as the plants all around them were.
- Giving of life for survival: Before the domestication of animals, it was widely held that they had the same intelligence as humans and that when an animal was killed for food it had been convinced to sacrifice itself. It had, in effect, given its body's life-nourishing meat so that humans might live.