Full Idea
Even though two separated things have a single interval between them, still the separation from here to there is not one and the same as the separation from there to here.
Gist of Idea
The separation from here to there is not the same as the separation from there to here
Source
Aristotle (Physics [c.337 BCE], 202b19)
Book Reference
Aristotle: 'Physics', ed/tr. Waterfield,Robin [OUP 1996], p.62
A Reaction
His example is the road from Athens to Thebes. Since we tend to quantify distances between places more than Aristotle did, we are less impressed by this distinction, which seems a bit subjective. Aristotle seems to be thinking of vectors.