What in a human life affords the closest thing to the feeling or experience of "foreverness"? My guess, at least at my current stage in life, is the death of a loved one or the death of a relationship, but I conjecture that these are related.
In the light of that otherwise deep, dark, sinking, forever-gone feeling, I wrote a song. Its name refers to the uncertainty of the future and forever as we humans proceed To God Knows Where.