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"Rain, rain, and sun! a rainbow in the sky!"
"She was sick with nausea so deep that she perished as she sat. And then, in the blowing clouds, she saw a band of faint iridescence colouring in faint colours a portion of the hill. And forgetting, startled, she looked for the hovering colour and saw a rainbow forming itself. In one place it gleamed fiercely, and, her heart anguished with hope, she sought the shadow of iris where the bow should be. Steadily the colour gathered, mysteriously, from nowhere, it took presence upon itself, there was a faint, vast rainbow. The arc bended and strengthened itself till it arched indomitable, making great architecture of light and colour and the space of heaven, its pedestals luminous in the corruption of new houses on the lowhill, its arch the top of heaven. And the rainbow stood on the earth. She knew that the sordid people who crept hard-scaled and separate on the face of the worlds corruption were living still, that the rainbow was arched in their blood and would quiver to life in their spirit, that they would cast off their horny covering of disintegration, that new, clean, naked bodies would issue to a new germination, to a new growth, rising to the light and the wind and the clean rain of heaven. She saw in the rainbow the earths new architecture, the old, brittle corruption of houses and factories swept away, the world built up in a living fabric of Truth, fitting to the over-arching heaven."

A rainbow is an optical phenomenon caused by refraction, internal reflection and dispersion of light in water droplets resulting in a continuous spectrum of light appearing in the sky. The rainbow takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun. Rainbows can be caused by many forms of airborne water. These in
"Rain, rain, and sun! a rainbow in the sky!"
"And, lo! in the dark east, expanded high, The rainbow brightens to the setting Sun."
"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!"
"Some day Ill wish upon a star And wake up where the clouds are far behind me Where troubles melt like lemondrops Away above the chimney tops, Thats where youll find me. Somewhere over the rainbow Bluebirds fly. Birds fly over the rainbow, Why then, oh why cant I?"
"Through gloom and shadow look we On beyond the years! The soul would have no rainbow if the eyes had no tears."
"O beautiful rainbow;—all woven of light! Theres not in thy tissue one shadow of night; Heaven surely is open when thou dost appear, And, bending above thee, the angels draw near, And sing,—"The rainbow! the rainbow! The smile of God is here."