"…and God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters. And God made the firmament, and divided the waters which were under the firmament from the waters …"
You don't need to believe in flat earth with a dome firmament above our head
in order to get into heaven but
it sure help when you're trying to make sense
of what the Bible is talking about.
God bless bro