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.
“I don't spend as much time on my hair as people think. I get out of the shower, whack some grease on there and I'm done.”
“In the arts the way in which an idea is rendered, and the manner in which it is expressed, is much more important than the idea itself.”