Imagination is the ability to see things that aren't there.
An example from the classic cyberpunk novel Neuromancer (1984), by William Gibson:
Two blocks west of the Chat, in a teashop called the Jarre de Thé, Case washed down the night's first pill with a double espresso. It was a flat pink octagon, a potent species of Brazilian dex he bought from one of Zone's girls.
The Jarre was walled with mirrors, each panel framed in red neon. ...
He stared at the black ring of grounds in his empty cup. It was vibrating with the speed he'd taken. The brown laminate of the tabletop was dull with a patina of tiny scratches. With the dex mounting through his spine he saw the countless random impacts required to create a surface like that. The Jarre was decorated in a dated, nameless style from the previous century, an uneasy blend of Japanese traditional and pale Milanese plastics, but everything seemed to wear a subtle film, as though the bad nerves of a million customers had somehow attacked the mirrors and the once glossy plastics, leaving each surface fogged with something that could never be wiped away.