It is not a bad song, but I hesitate to call it a hymn. There is no mention of God until the last verse. When it does invoke God, it is mostly to celebrate and preserve what they have, and not as much about salvation and Heaven. I would guess the writer was much more secular in his outlook than religious.
” I hesitate to call it a hymn.”
Compilers of hymnals for a century would disagree.
But, then, I don’t call Contemporary Christian Music “Christian”, either.