After death no immediate mass change is detected, so I think soul cannot be made of matter(which has mass),nor can be made of antimatter(else it cannot coexist with matter) So is it made of energy or anti energy(something which can nullify energy) or energy glue(something which can capture energy and convert it into matter) ? If soul is not made of matter, burning in hell or enjoying in heaven how do they make sense? What does your scripture say?