“Man is by nature competitive, combative, ambitious, jealous, envious, and vengeful.”– Arthur Keith Related Quotes “Ripe summer’s sweetness drippedin pearls from every treeand into my opened hearta little drop ran down.”— Edith Södergran “An individual cannot be considered entirely sane if he is wholly ignorant of scientific method and structure of nature and so retains primitive semantic reactions.”— Alfred Korzybski “Ah, but when one predator leaves, another inevitably will take its place. A void never remains a void for long.”— A.T. Baron