Reincarnation
At death, the essence or soul of people is reborn in a body, plant or animal again and again without stopping, but it never disappears completely. A person's spirit travels through different bodies and different lives in order to learn the lessons of existence itself, which in the future will allow it to transcend from worldly consciousness by evolving into a semi-divine spirit.
Solipsism
Also known as the theory of the self-centered, we are the only person who exists and the whole universe is the result of our imagination. All the people, all the events, the past and the future are product of our mind, the reality is an illusion created by means of our conscience. We are the only real thing, so when we die the universe no longer exists.
Déjà Vu
Our existence would be like an album that, when it reaches its end, repeats itself over and over again. No one would be aware of this repetition other than in the déjà vu that is sometimes experienced and which would be like a reminder that life is a cycle that has been going on for tens or hundreds or thousands of years without being altered in anything more than small details. In reality there would be no death, the Beyond would be life itself with its different versions of itself.