He who has eyes to see...
(Tim) The wonder of this world is that in His wrath against sin God doesn't consume every last one of us. Not your neighbor, but you. Not the Roman Catholic priest or Mormon elder, but me. By all rights, each and every day should end with a universal flood that consumes us all.
But God Who is rich in mercy has promised He will never do it again and the rainbow is His covenant sign that this promise of mercy will stand until the end of time.
That is what this means. And our friend is right to be overwhelmed and cry. Our Heavenly Father made a sign of terrible beauty and splendor to point to a covenant of unbelievable mercy and love.
It shall come about, when I bring a cloud over the earth, that the bow will be seen in the cloud, and I will remember My covenant, which is between Me and you and every living creature of all flesh; and never again shall the water become a flood to destroy all flesh. When the bow is in the cloud, then I will look upon it, to remember the everlasting covenant between God and every living creature of all flesh that is on the earth.(Genesis 9:14-16)