rainbows in curved air (or curves in rainbowed air)

Walking


"The rhythm of walking generates a kind of rhythm of thinking, and
the passage through a landscape echoes or stimulates the passage
through a series of thoughts. The creates an odd consonance between
internal and external passage, one that suggests that the mind is
also a landscape of sorts and that walking is one way to traverse it.
A new thought often seems like a feature of the landscape that was
there all along, as though thinking were traveling rather than making."

Rebecca Solnit, Wanderlust: A History of Walking