As far as the east is from the west,.... Which Kimchi thinks is mentioned because it contains the length of the habitable world; and therefore it is not said as far as the north is from the south; since a man can go from east to west, but not from north to south, because of the extreme heat and cold.
But this distance is not given with respect to those opposite parts of the earth, which scarcely exceed 12700 miles; but with respect to those opposite points in the heavens: and the meaning is, that as far as the eastern point of the heavens is from the western point of them; which more illustrates the matter in hand, or the blessing later mentioned, than the other.