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Of the 17 times the word firmament is used in the Bible, over half (or 9) of the times are found in Genesis One. Firmament means an expanse or expansion of space and it refers to the expansion of space between the earth and God's heavenly abode. It is bound by the waters above and the waters below (Genesis 1:6-8). This explains why there are "waters that be above the heavens" (Psalm 148:4). Of the three heavens indicated in 2Corinthians 12:2, the firmament includes the first two heavens while the third heaven refers to God's dwelling place. The first heaven is the "open firmament of heaven" where the birds fly (Genesis 1:20). The second heaven is "firmament of the heaven" where the planets and stars reside (Genesis 1:14-15). As known to anyone who has considered the heavens as the work of God's finger (Psalm 8:3), the firmament exalts God. As the psalmist proclaims in Psalm 19:1, "The heavens declare the glory of God; and the firmament sheweth his handywork."