So death and judgment, death and judgment - so that in Sheol already the good are separated from the evil. Now here you have the Christian concept. The Kingdom of God which comes to an end at the moment of death. After death, judgment. In the hereafter the souls of the good are separated from the souls of the evil ones - as Christ puts it, the sheep from the goats.
Death is separation between body and soul.
But if we use that expression, we create an insurmountable problem for ourselves, a difficulty. If body and soul are really separated in death and reunited again only on the day of resurrection, then during the time between death and resurrection man would not be a human being any more but a disembodied spirit. He would not belong to the physical universe anymore but to the spirit world. In other words he would be an angel, not a human being. And that is impossible.