The universe is very, very big. It also loves a paradox. For example, it has some extremely strict rules. Rule number one: Nothing lasts forever. Not you or your family or your house or your planet or the sun. It is an absolute rule. Therefore when someone says that their love will never die, it means that their love is not real, for everything that is real dies. So lets suppose that we are wise enough to learn and know that truth, and yet not wise enough to control our learning and knowledge, so that we use it to destroy ourselves? Even if that is so, knowledge remains better than ignorance. It is better to know, even if the knowledge endures only for the moment that comes before destruction, than to gain eternal life at the price of a dull and swinish lack of comprehension of a universe that swirls unseen before us in all its wonder. That was the choice she made, and it is one he is making, too.