A Cor segundo Goethe IV - Entre o Amarelo e o Vermelho

Julius Sergius von Klever, Walking on the Water 

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«The active side is here in its highest energy (...).
It produces an extreme excitement, and still acts thus when somewhat darkened.»
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Johann Wolfgang von Goethe, Theory of Colors (1810),
Citado por Maria Popova, «Goethe on the Psychology of Color and Emotion - “Color itself is a degree of darkness.”»
in https://www.brainpickings.org/2012/08/17/goethe-theory-of-colours/