Reminiscing Rainbow

For a start, Over the rainbow may sound cliche, but I'm neither over nor under any rainbow at this point. To the community,rainbow colours do represent something else and to me,there are many reasons i chose this as my blog title. For the future to come,I wish you all a colourful life.

A poem of William Wordsworth from 1802, "My Heart Leaps Up When I Behold The Rainbow", begins:
My heart leaps up when I behold
A rainbow in the sky:
So was it when my life began;
So is it now I am a man;
So be it when I shall grow old,
Or let me die!…

Left-Noah's Thanksoffering (c.1803) by Joseph Anton Koch. Noah builds an altar to the Lord after being delivered from the Flood; God sends the rainbow as a sign of his covenant (Genesis 8-9).
Right-The Blind Girl, oil painting (1856) by John Everett Millais. The rainbow – one of the beauties of nature that the blind girl cannot experience – is used to underline the pathos of her condition.
Extracted from Wikipedia

God sends the rainbow as a sign of his covenant and Noah saw it. Rainbow is a good sign then?

Is it a good sign then if the blind girl cannot see it? Can we enjoy things we can't see? Can we enjoy things we don't have? Can we enjoy things we can't feel?