I know that Miller was compelled to find out what ended the species that formerly lived on New Terra and that the glowing (but not glowing) thing that he can't see but Elvi can see is the key to finding it, but what was Miller's ultimate motive for sacraficing himself to turn off the grid of the planet? He didn't learn anything about the species that ended the race that his faux-consiouness belongs to by doing it?