Even if you walk exactly the same route each time - as with a sonnet - the events along the route cannot be imagined to be the same from day to day, as the poet's health, sight, his anticipations, moods, fears, thoughts cannot be the same.
“Nostalgia, the vice of the aged. We watch so many old movies our memories come in monochrome.”
“The toilets at a local police station have been stolen. Police say they have nothing to go on.”