Natasha decides to go to the museum anyway and heads straight for her favorite part, the Hall of Meteorites. There, she finds her favorite meteorite, closes her eyes, and thinks it's hard to believe that it came from outer space. She thinks the room is her church, and this is where she would've taken Daniel. She would've asked him to write poems about the astounding number of things that just happened to go right in order to create the universe. Natasha thinks that falling in love doesn't even compare.
For Natasha, the idea that the universe was predestined is just too much given what she knows about science. It's easier for her to see the creation of the universe as being brought about by related but random events, which shows that she still doesn't buy into the idea that everything in the world is somehow cosmically connected.
Daniel writes a poem called "Symmetries." he writes that he'll stay on his side, and an unnamed other person will stay on a different side.
Later, the narrator will mention that Daniel will write poetry that's all about Natasha; this moment can be read as informing that future.