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"Rain, rain, and sun! a rainbow in the sky!"
"An argument can be legitimately sustained only if the participants are speaking about the same level. Argumentation would — for the most part — be replaced with something akin to Niels Bohrs principle of complementarity. Information from and about the different vibratory levels of bands of consciousness — although superficially as different as X-Rays and radio waves — would be integrated and synthesized into one spectrum, one rainbow. … Each band or level, being a particular manifestation of the spectrum, is what it is only by virtue of the other bands. The color blue is no less beautiful because it exists along side the other colors of a rainbow, and "blueness" itself depends upon the existence of the other colors, for if there were no color but blue, we would never be able to see it. In this type of synthesis, no approach, be it Eastern or Western, has anything to lose — rather, they all gain a universal context."

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."