Rainbows are a natural phenomenon that occur after rainstorms, and they symbolize peace and rebirth. Scientifically, rainbows are caused by reflecting light against water, but spiritually and metaphysically they take on an entirely different meaning, and they are often referred to in Greek mythology, The Bible and in metaphysical writings. The most visible colors of the rainbow include red, yellow, blue and violet, creating a beautiful visual scene.
In Judeo-Christian traditions, the appearance of a rainbow is considered a sign that God is not planning to destroy the earth with another flood. Rainbows are also considered lucky, and traditional Irish stories often refer to a "pot of gold" at the end of the rainbow. Buddhist tradition considers the rainbow the highest spiritual plane one can access before crossing over to the other side, and Armenian mythology states that the rainbow belongs to the sun god. Rainbows are also often considered a sign from "above," especially when they appear on a sunny, rain-free day. In other cultures, however, the rainbow is considered a bad omen. In Bulgaria, ancient lore states that if one walks underneath a rainbow, their sex changes, and in Burma, age old legends claim the rainbow is actually a devilish monster.