I don't "believe" in life after death; I know it with a certainty.
God created each of us in His image and likeness, and He is not Homo sapiens. That means that each of us is a timeless, spiritual source of creation, for that is the "image" of God.
We have become separated from the Father by our decision to turn away from Him. That great turning away was the decision to take on the blindfold of ego. Because of this, we are required to look through human eyes in order to perceive the world around us.
I have experienced seeing without human eyes -- and it occurred only because ego was entirely missing during those few moments.
Judgement is nothing more than action-reaction law. If you jump off of a building, the ground "judges" you at the speed of impact. This is God's law meeting your decision head-on.
Each human life has its own vector of creation. If you lived a life full of love, it may be judged lovingly. But if you lived a life of judgment, condemning others because they didn't do things the way you thought they should, then you will likely be condemned. But the true self is more than just the one bodily life.
I have remembered thousands of prior lives, most of them only fleetingly. Most of those memories helped me to unburden the past so I could be free. As Jesus said, know the truth and it will set you free. One of those past lives has remained vivid in my memory. It was of a life nearly 12,000 years ago, after the refugees left the great island empire when it sank. I suffered greatly to help my fellow refugees survive those first few years in the wilderness of Europe.
What Jesus talked about remains the most important, here. That we can gain everlasting life. What is this?
When we took of the forbidden fruit in the Garden, we pulled the separateness of ego over our spiritual eyes, and lost consciousness. We regained consciousness only through the Homo sapiens bodies that God created for us. With each bodily death, we again sink into unconsciousness. Only with the release of ego will we ever restore spiritual consciousness. When that happens, consciousness will not end with bodily death, because our true, spiritual selves will be reborn.