Description:

Will Durant believes that beauty is born of desire. One of the salient signs that beauty is born of desire is that the desired object loses its beauty once it is obtained. What we want is not for the good, but for the good that we want.
The blue of the sky is not for our pleasure, but our eyes have gradually become accustomed to the blue sky. The natural pleasure of any shape and color is relative to its repetition in the human past.