Proximity

[Heaven gives its glimpses only to those/
Not in position to look too close.]
-Robert Frost, "A Passing Glimpse"

so does that mean that the equation looks something like this:

sight [sub: heaven] = r [sub: earth-heaven]

I think there should be some established limits, "where r becomes infinitely large" doesn't make sense practically, philosophically, or religiously....

I'm just giving you a hard time Mr. Frost, I gotcha. ;)