We would have to know what really happens after death. If there were creatures being able to live forever it would be normal for them, actually nothing in the universe lives forever, even the universe itself won't live forever it's aging in fact! What probably will "live forever" is the quantum vacuum energy, for whatever reason and for any "particles traveling with light speed" there is no time passing, so the question of eternity is nonsense in this case. So if we think that "life/ soul" after death becomes energy and reunited with the universe, there will be no time passing at all for this part of us.