I think the Bibles try to explain that the goal of "LIFE" is to learn to trust your maker and in the same breath, realize your maker is your teacher with you. Many take this that all humans are GOD, "all" atoms make up GOD. God animates all living things. We have lived for as long as God, we never die. Those not of God, won't seek God; there is a spiritual war between good and evil. WHY? No one really knows, the soldiers don't question the commander/teacher. I think once you have learned to trust, then you also become the witness. Upon judgement day, the witnesses will be there as the ungodly are judged.
You here the word "SCENE" used many times by those in the know; they see life as a well orchastrated play, that each segment of life is a new scene in the play. They will refer to people as actors in this play. Most in the know will agree, all humans are predestined as the Bible states. That humans pick their role prior to picking who there parents will be.