"Things change. You can't step in the same river twice, the center cannot hold, every flea has smaller fleas and so on ad in finitum, and so on." Hermes pauses for a moment, "Although, I have thought of a good way to prove what I've said. Do you have a glass of wine handy? Hatch up a bottle of olive oil? If you do and you can pour it out on the ground -- not the floor, but actual soil -- and give me a shout, I can be wherever you are in an instant."