On Vision and Colors tried to demonstrate physiologically that color is "specially modified activity of the retina." The initial basis for Schopenhauer's color theory comes from Goethe's chapter on physiological colors, which discusses three principal pairs of contrasting colors: red/green, orange/blue, and yellow/violet. This is in contrast to the customary emphasis on Newton's seven colors of the Newtonian spectrum. In accordance with Aristotle, Schopenhauer considered that colors arise by the mixture of shadowy, cloudy darkness with light. With white and black at each extreme of the scale, colors are arranged in a series according to the mathematical ratio between the proportions of light and
When I Consider How My Light is Spent was responsible in the Commonwealth government. However, the references to light and darkness in the poem make it virtually certain that Milton's blindness was at least a secondary theme. The sonnet is in the Petrarchan form, with the rhyme scheme a b b a a b b a c d e c d e, as can be seen in the text below. When Milton writes "that one talent which is death to hide" he is specifically alluding to the parable of the talents in the Gospel of Matthew. When I Consider How My Light is Spent "When I Consider How