"He [Vincent] often complained that he was the only painter in town [ Arles ] and therefore could not talk to anyone about his art. For lack of such a colleague, he would talk to me about complementary colors. But I really could not understand why red should not be red, and green not green!. .When I saw that he outlined my head entirely in green (he had only two main colors, red and green), that he painted my hair and my mustache - I really did not have red hair - in a blazing red on a biting green background, I was simply horrified. What shouldn't I do with this present?"