Cross-readings along the axes of jealousy:

S.C.U.M manifesto [EN] (1967)
He is trapped in a twilight zone halfway between humans and apes, and is far worse off than the apes because, unlike the apes, he is capable of a large array of negative feelings--hate, jealousy, contempt, disgust, guilt, shame, doubt--and moreover he is *aware* or what he is or isn't.