All the colors of the rainbow are contained in the white light of the sun.
When refracted by water, the lights break forth.
The rainbow amazed scientists in the past. Isaac Newton even asked: "What is a rainbow?"
The rainbow is a picture of perfect, white light refracted into its seven base colors.
In contrast, the emblem of the gay rights movement is a six-colored banner, and does not represent a real rainbow.
The first mention of "rainbow" in the Bible refers to God's Covenant with Noah, and with all of us (Whether you believe on Him or not):
"And God spake unto Noah, and to his sons with him, saying, 9And I, behold, I establish my covenant with you, and with your seed after you; 10And with every living creature that is with you, of the fowl, of the cattle, and of every beast of the earth with you; from all that go out of the ark, to every beast of the earth. 11And I will establish my covenant with you; neither shall all flesh be cut off any more by the waters of a flood; neither shall there any more be a flood to destroy the earth. 12And God said, This is the token of the covenant which I make between me and you and every living creature that is with you, for perpetual generations: 13I do set my bow in the cloud, and it shall be for a token of a covenant between me and the earth. 14And it shall come to pass, when I bring a cloud over the earth, that the bow shall be seen in the cloud: 15And I will remember my covenant, which is between me and you and every living creature of all flesh; and the waters shall no more become a flood to destroy all flesh. 16And the bow shall be in the cloud; and I will look upon it, that I may remember the everlasting covenant between God and every living creature of all flesh that is upon the earth. 17And God said unto Noah, This is the token of the covenant, which I have established between me and all flesh that is upon the earth." (Genesis 9: 8-17)
God established a covenant with all of us, for ever person walking on this earth is a seed, or a descendant of Noah and his three sons.
This perpetual covenant is based on the token, the bow in the sky.
The Light of the World, broken for us:
Jesus is this light of the world (John 8: 12), When God said "Let there be light", He did not create the light, but rather manifested this Light as the first of all things.
That Light is Jesus Christ.
God made a covenant with Abram (Genesis 15), but in reality, God cut the covenant with Jesus Christ:
"17And it came to pass, that, when the sun went down, and it was dark, behold a smoking furnace, and a burning lamp that passed between those pieces." (Genesis 15: 17)
That smokling furnance and burning lamp was Jesus. If God had cut the covenant directly with Abram, then he would have been responsible for keeping his part, and no man can keep a covenant with God.
Today, under the New Covenant, Jesus, the Light of the World broken for us, is the mediator of the New Covenant.
His blood was shed for us that we may receive His wealth and understanding, in fact, that we may receive all of Him:
"Whereof I am made a minister, according to the dispensation of God which is given to me for you, to fulfil the word of God; 26Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints: 27To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory:" (Colossians 1: 25-27)
This hope does not disappoint, by the way (Romans 5: 5), but rather is a certainty of good things to come, because you are accepted in the Beloved (Ephesians 1: 6)
"Accepted" in Ephesians 1: 6 literally says "graced" or "or enriched with grace".
The rainbow, with all seven colors, represents God's grace, not God's permission to sin, and certainly not a banner for men and women to abuse their bodies:
"For this is as the waters of Noah unto me: for as
I have sworn that the waters of Noah should no more go over the earth; so have I
sworn that I would not be wroth with thee, nor rebuke thee." (Isaiah 54: 9)
The same grace which we receive in Christ teaches us all things, including to honor our bodies:
"11For the grace of God that bringeth salvation hath appeared to all men, 12Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world; 13Looking for that blessed hope, and the glorious appearing of the great God and our Saviour Jesus Christ; 14Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works." (Titus 2: 11-14)
Now, homosexuality is sin:
"24Wherefore God also gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies between themselves: 25Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen.