The promised paradise is the visualization of goodness and the Hellfire is the visualization of evils. The reason why the lives of the people of paradise is an eternal one is because the paradise is inseparable from its people. one father in the world can deny his relationship with his son; the father is never separated from the son, because they are of the same essence. So, the result of an action is too an integral part of the action and its doer.
source : erfan.ir
