“Above and beyond all else it must be borne in mind that hatred tends to dry up the springs of creative thought in the life of the hater, so that his resourcefulness becomes completely focused on the negative aspects of his environment. The urgent needs of the personality for creative expression are starved to death. A man's horizon may become so completely dominated by the intense character of his hatred that there remains no creative residue in his mind and spirit to give to great ideas, to great concepts.”