"I set My bow in the cloud, and it shallbe for a sign of a covenant between Me and the earth." Exodus 9:13
It was absolutely awesome to behold that giant object in the sky as I was walking under, and usually I think of it without the biblical reference in my mind, and I think about how it's a giant prism effect of nature. That's the view I was taught in schools, nothing at all to do with God's covenant to the earth, or His promise.
"And I establish My covenant with you; and all flesh shall never again be
cut off by the water of the flood, neither shall there again be a
flood to destroy the earth." Exodus 9:11
I think what gets me the most about the whole experience of seeing this huge rainbow is that its so crazy amazingly obvious to the everyone who sees the rainbow that there's this huge thing in the sky. It's so colorful, and unnatural to see such a thing in the sky. God calls it His "bow". I think we should rename it from rainbow to God's bow! The heavens declare the glory of the Lord! I feel like I have to shout it. How can you not smile as you go into work after seeing that kind of thing in the sky! Remember God through your day. Think about how the heavens are declaring the Glory of the Lord. My final point being, shouldn't we too?