Was I to be Earth's first casualty in the Attack of the Giant Ass From Hilbert Space? - Rudy Rucker

Just as a rock is already in the Universe, whether or not someone is handling it, an idea is already in the Mindscape, whether or not someone is thinking it. A person who does mathematical research, writes stories, or meditates is an explorer of the Mindscape in much the same way that Armstrong, Livingstone, or Cousteau are explorers of the physical features of our Universe. The rocks on the Moon were there before the lunar module landed; and all the possible thoughts are already out there in the Mindscape.
The mind of an individual would seem to be analogous to the room or to the neighborhood in which that person lives. One is never in touch with the whole Universe through one’s physical perceptions, and it is doubtful whether one’s mind is ever able to fill the entire Mindscape.

There are many possible realities, infinitely many. Yet most of them are not . . . alive. Most of them are like books that no one ever actually wrote. A group-mind, like humanity's, lights up one given world. What makes this world different from some ghostly alternative universe is that we actually live here.

This is just so typical of you, Alwin, to be in love with a giant ass.