The colors are red, yellow, orange, green, blue, violet and indigo. 7 colors.
The basic tones of music are seven. I said nature exist fundamentally in 7.
Seven is the number of completion.
Seven is a characteristic of the universal mind which expresses itself in the universe. Our individual minds are able to perceive sevens as a number of nature because we are individuated from the universal mind. The Universal Mind is all of us. We are all One Mind.
Those who are united with the One Mind can see the Seven. Those who separate themselves fail to see what the One Mind sees.