Although we do not have a Celtic creation myth preserved in the corpus of written and oral materials, I think it would be reasonable to think that their myth might follow this pattern as well.
If creation requires death and dismemberment to occur, then it would follow that only the sacrifice of something living will do to fulfill a cosmological sacrifice.
And that approach gets them nowhere most of the times.
They’re a crucial part of your personal development. Here’s what Mark Manson (one of my favorite bloggers) says in “No, You Can’t Have it All”: “If you’ve ever taken an economics class, one of the first things you learn is a concept called “opportunity cost,” an idea often illustrated with the quote, “There’s no such thing as a free lunch.” Opportunity cost means that essentially everything you do, no matter what it is, costs something, even if indirectly.
In Norse myth, we have, if I recall correctly, the giant Ymir who is killed and whose body creates the cosmos.
This is paralleled in Hindu cosmology, where the sacrifice by the Brahmans reenacts the death of a divine, cosmic being whose body creates the cosmos.
Do you invest time, sleep, effort and energy, or give up some of the stuff you’re used to and enjoy doing?
One of the primary functions of sacrifice is the renewal of the cosmos.
We also know from a Welsh medieval medical text, and from Irish tradition, that the body is related to the cosmos in Celtic thought.
The eyes may be the stars, sun be the face, breath be the wind, stone as bones, water as blood, soil as flesh, etc.