i figured enlightenment to your question could be found in the qld graphs where we have an abundance of "0"
some scrutiny has revealed that in fact the arrow points away from the origin
Just think of the arrows: they let the birds perch and fly, with no intention to call them when they come and no longing for their return when they fly away. If people's hearts can be like the arrows, they will not be off the Way.
If there is never any wind, does the arrow understand the concept of "direction" - or is that just a human construct?