I heard this in the preach this morning..... If you travel north from where you are you will eventually start to travel south as you will past the north pole. If you travel south from where you are you will eventually begin to travel north as you will past the south pole.... On the other hand if you travel west you will continuously go west, same as if you travel east you will always travel east. So when the bible says as far as the east is from the west that's how far God removes our transgressions from us - that is because the distance is immeasurable, it is continuous, there is no end...
I cannot promise you much - just my random ramblings and mixed up thoughts....