Gnomes live ten times faster than humans. They’re harder to see than a high-speed mouse. That’s one reason why most humans hardly ever see them. The other is that humans are very good at not seeing things they know aren’t there.”
From Wings (1990) by Terry Prachett — find it here.
(Photo by Silver Birch shot on Sunset Blvd., Silver Lake, Los Angeles)
Silver Birch Press 