Something written in the sky

Why is there a message in a rainbow? It is because rainbows, beyond just their scientific explanation, have been the subject of myth and mystery all over the world. Most cultures understand that rainbows are simply the sun shining through rain, and that is correct. But they take on all kinds of meaning, including, in Greek mythology, bringing messages from the gods. Since the time of Noah, men have looked upon it to remember the covenant between God and all flesh on earth written in the Bible. So a rainbow is like something written in the sky for men to interpret as they will.

Heartfreek September challenge - Something Written
DDW September challenge - Water