If the soul is linked to consciousness, why is consciousness lost when the brain is physically damaged? The person is not dead, yet their memories and awareness are gone.
Are you referring to the ancient Jewish meaning of soul or to the Greek one? As far as I understand, the former is inextricably linked to the physical hardware, kind of like the light that goes out when the lamp goes bust. The latter is a philosophical concept of something that exists outside of the physical shell.
Not sure really, the idea that there's some energy which carries our memories and consciousness. And then this energy retains the information from the brain and can exist outside of the physical body, potentially for eternity in some other dimensional plane.