" I believe I have already suggested that colour is the most obvious bridge between emotion and perception, that is, between subjective experience of the psyche and quality objective in nature. Both light up only between the extremes of light and darkness, and in their reciprocal interplay. Thus, outward the rainbow--or, if you prefer it, the spectrum--is the bridge between dark and light, but inwardly the rainbow is, what the soul itself is, the bridge between body and spirit, between earth and heaven. "

― Owen Barfield