by jimwalton » Tue Jun 14, 2016 10:43 am
Perhaps a few quotes would be the best way to respond. Victor Hamilton says, "A common motif in ancient Near Eastern iconography is that of a bow-wielding (a weapon) deity. It is a symbol of his prowess. With his lethal weapon he eliminates his foes. The OT itself describes YHWH as a warrior (Ex. 15.3) who vanquishes his opponents with a bow and a quiver full of arrows (Hab. 3.9). So too do God’s representatives fight off their assailants with the bow (Gn. 49.23-24). But here, in what is nothing less than a radical interpretation of divine power, the bow ceases to function as a symbol of combat and is now a symbol of peace and well-being. Its placement in the clouds points to the cessation of God’s hostilities against mankind."
James Boice says, "This was probably not a miraculous sign, but assigned as a symbol of spiritual truth."
John Walton writes, "The designation of the rainbow as a sign of the covenant does not suggest that this was the first rainbow ever seen, nor that every rainbow is associated with this covenant. The function of a sign is connected to the significance attached to it. In like manner, circumcision is designated as a sign of the covenant with Abraham, yet that was an ancient practice, not new with Abraham and his family. In the Gilgamesh Epic the goddess Ishtar identified the lapis lazuli (deep blue semi-precious stones with traces of gold-colored pyrite) of her necklace as the basis of an oath by which she would never forget the days of the flood. An eleventh century Assyrian relief shows two hands reaching out of the clouds, one hand offering blessing, the other holding a bow. Since the word for rainbow is the same word as that used for the weapon, this is an interesting image."
Notice also that the sign of the rainbow is for God's benefit, not man's (Gn. 9.15). It's not that God needs reminding or that something is faulty with his memory. Again, from Hamilton: "The language here appears again in conjunction with the Passover observance in Egypt. Although the blood is a sign for the people (Ex. 12.13), it is splashed on the doorframes so that God may also see it. The point is that God’s promises are entirely believable. His words are totally trustworthy. He backs up his word with an act to eliminate even the possibility of forgetfulness. One need not worry that God is capable of stooping to prevarication. He stands by his word."
So, you see, it has nothing to do with mythological interpretation of a natural phenomenon, but a natural reminder of a spiritual truth, as is frequent in the Bible (like "pile up these rocks as a memorial").