What Happens After Death?

 https://www.chabad.org/library/article_cdo/aid/282508/jewish/What-Happens-After-Death.htm

While there are numerous stations in a soul’s journey, these can generally be grouped into four general phases:

1. the wholly spiritual existence of the soul before it enters the body;
2. physical life;
3. post-physical life in Gan Eden (the “Garden of Eden,” also called “Heaven” and “Paradise”);
4. the “world to come” (olam haba) that follows the resurrection of the dead.

What are these four phases, and why are all four necessary?