[Brookhaven]

The Bible is using figurative language here. The point is to suggest a great distance to give us an idea of just how far our sins are removed from us.

[raygun]

Copy that, concerning the immense distance, but how far in context of:

I, even I, am he that blotteth out thy transgressions for mine own sake, and will not remember thy sins. - Isa 43:25

Does the passage in Psa intimate the same thing as suggested in Isa IF north and south were used instead of east and west?

For there to be a distinct and notworthy difference, the directions could only apply on a sphere, no? How far does one have to travel north in a straight line before they turning south (still in a straight line), albeit pretty far but how much farther does one have to go WEST in a straight line before beginning to travel EAST?