The body, spirit and soul will die and dissolve again, but the Kia will pass on. The Kia and fragments of previous spirits, souls and bodies will pass through countless incarnations, accumulating experiences and losing them. Some experiences will be useful, and will be remembered. Others will be useless and will be forgotten. Some lessons will be hard, and may take hundreds or more incarnations to learn.
Many beings forget what they have learnt in an instant, and start over again.
Entropy is a force of balance. When something is unbalanced, it will change. It may change in many ways but eventually it will become stable. If there is balance, entropy will sooner or later overturn it. There must be a balance of balance.