Consciousness is the creator creating the creation and all of the above. It does not cease upon physical death because it underlies and creates the physical. A portion of the conscious spectrum is gone, i.e. your body & your life, but the mind, its personality and all it has experienced continues in more subtle realms.
You want proof of life after death? You go to school for years and years and years to get educated and secure the perfect job but won't spend a solid month confirming the existance of the other realms or even a few weeks seriously contemplating the possiblity.
It's there, it's been explored, it's been studied. It is subjective and until you begin to entertain the possibility, it is impossible to know the truth until