Many people believe we have some kind of "spirit" or "soul" that is some how above, in a different spiritual dimension, or whatever from our physical body. Many of these people believe this spirit will arise, or be freed, or whatever from the physical body when it dies. We do not believe anything like this is true. We believe that everything we consciously experience is part of the physical brain; that when we die, the conscious properties that existed cease to exist, or at best, like the rest of the matter of our body, disassociates as it rots into the rest of the natural entropy of the universe.
This, however, does not change the possible belief that if you achieve the ability to take the right physical stuff, and properly reconstitute it in the correct state, it will again be you. All that is required for such is the technical ability, and the required information about your state.