The idea that God or his agents may physically visit the Earth by riding on a piece of heaven may seem ridiculous. However it appears that a section of firmament is used like an elevator to travel between heaven and Earth.
Riding the Heavens
Firmament 14
Sing unto God, sing praises to his name: extol him that rideth upon the heavens by his name JAH, and rejoice before him.
The Firmament Rabbit Trail
One of our favorite ways to study the Bible is to follow a doctrine through from the first time it's mentioned to the last. This is a great way to develop understanding of the doctrine in the broad narrative of scripture.
April 2nd
Knowing how the firmament is constructed lets us interpret scripture and account for empirical observations of the cosmos, including 90% of the mass of the universe that mainstream science (SciPop) can't find.
Matty's Paradigm 