I've recently spent a lot of time reading the Tibetan Book of the Dead. I tried reading it in my 20s but I did not connect with it. I'm much older now and it I found it to be fascinating. I'm still not 100% on board with only having an Eastern religious way of thinking. I still resonant with the Western religious idea of a vision of a heavenly Jerusalem. In Eastern religion it seems to me to be more about being in tune with nature but letting it happen to you. Eastern religion to me seems to be more about achieving harmony and peace in the face of unending suffering. In the Western mindset. it's about controlling or dominating nature. To me, there seems to be a unity of opposites between the two ways of belief. And what is in the middle is the realization of having a balance between listening and talking is our highest purpose.
In terms of our ultimate purpose consider the merging of the following ideas. Consider the many-worlds interpretation of quantum mechanics. Combine this idea with the Tibetan Buddhist idea of personal reincarnation. In our life, our goal is to achieve a certain level of consciousness where when we die we graduate to the Buddha state. Once we achieve this state we become a steward of our Universe along with all the other infinite number of Buddhas managing the multi-verse. In this state of stewardship, we become the consciousness needed for the realization of each quantum state under observation. It's a thankless job requiring and infinite amount of patience dealing with the minutest details of mundane existence. It's a combination of listening and talking at fabric of nature's existence.
The purpose of the multiverse is to create more Buddhas needed in governing an infinite number of Universes in order to achieve a complete realization of God's omnipotence.
Now say you die and you don't have what it takes to attain the Buddha state. Then when our angers, petty desires, our lack of selflessness, or our lack of selfishness, dominates our consciousness we then return to the pool of consciousness from which we came. I'm not sure I completely believe in reincarnation the way the Tibetan book describes it as a conscious will choosing the location of its next reincarnation. I'm not sure the obsession with finding the right place supporting good Dharma is that important. Before anyone was ever been reincarnated consciousness had to begin from somewhere. It's a big pool and there's a lot of people being born everyday!
If you are looking for evidence of our purpose then you will be disappointed. Most people who are looking for evidence of purpose or evidence of God have no sense of spirituality. There's something extremely profound in that we are made of the very stuff we are experiencing. I recently found a fascinating talk on the idea of consciousness boundaries:
You can easily dismiss Joan Tollifson's talk as some goofy middle age crazy woman. But if you have some patience and listen to what she's is saying it's a very well-done talk.
Before you can really understand our purpose you have to get beyond evidence-based thinking. Evidence doesn't exist out there because you have to combine subjective and objective experiences to get even close to understand our purpose. With evidence-based thinking there is no room for subjective experience as being evidence. The word purpose implies or requires a certain level of subjective judgments and experience.