And if the way be too long for you, so that you are not able to carry it, because the place is too far from you which Hashem your God shall choose to set His Name there, when Hashem your God blesses you.
English: "Because the place is too far from you" — It is obvious that if he is outside and his load is inside, the walls have absorbed it. If he is inside and his load is outside, what is the law? An elder taught: "because the place is too far from you" — from your full self.
On the daf / in context: Redeemability depends on whether the owner together with his load is still considered inside; if either is outside, the place is regarded as distant.
Type of Learning
Derash on the verse (Bava Metzia) — the criterion of distance is the owner’s full presence.
What Is Learned
Ma’aser sheni may be redeemed only when the place is distant from the owner’s full self; if either the owner or the load remains inside the walls, redemption is not permitted.