I had a dream that I met a girl in a dying world. [...] I knew we didn’t have long together. She grabbed me and spoke a stream of numbers into my ear. Then it all went away.
I woke up. The memory of the apocalypse faded to mere fancy, but the numbers burned bright in my mind. I wrote them down immediately. They were coordinates. A place and a time, neither one too far away.
What else could I do? When the day came, I went to the spot and waited.
And?
It turns out wanting something doesn’t make it real.
~ Randall Munroe, xkcd #240: Dream Girl
Except that in this case it did.
What made it real was (among other things) Randall posting that comic. He wanted the meetup, and chose that method to publicise it.
Wanting something isn’t sufficient: desire is a force that acts upon you, not on the universe.
Just reading that maxed out my GDA for fuzzies.