To truly know one has to understand both the Hebrew and Greek languages as well as the culture of the Israelites at the time of the writing of scripture. The Greeks influenced the Jews belief in the afterlife. The Gehenna mentioned in the Bible is direct proof of this. Just like the Christian doctrine of hellfire didn't come about until about 500 years after Jesus death.
The Israelites originally did not believe in an afterlife. They believed if you obeyed God's laws you would be blessed with a happy, full life. Later the idea that the souls of the dead just hung out underground eternally. Eventually they adopted a belief very similar to Jehovah's Witnesses doctrine of a resurrection on Earth.
The doctrine of the eternal soul most likely came from the Greeks influencing the Jews. As the Romans hijacked Christianity the idea of an eternal soul going to heaven was adopted by the Church.
My new belief is based on the words of Jesus in Matthew, Mark, and Luke. The Kingdom of God is within us. Paradise is here, but you only experience it if you practice Jesus teachings - love everyone as you would love yourself, do not judge, forgive everyone, care for the sick, feed the hungry, clothe the poor, be content with just your basic material needs being met.