Rainbows are actually circular. we only see part of the circle because the earth gets in the way. It is possible to see the full circle and has been seen from the air in planes.
The number 7 seems to be very significant in our life on earth.
7 notes on a musical scale,
7 visible colours in the spectum (like notes they repeat at a higher frequency)
7 years our bodies are fully replaced by our ever changing cells. [Physically no part of us is with us] 7 is the cycle of growth.
The seven dominant chakras.
The mind looks for pattens and it looks like we look at the patterns of our natural world to create associations.
Alex
