Such is the audacity of man, that he hath learned to counterfeit Nature, yea, and is so bold as to challenge her in her work. – Pliny the Elder, The Natural History, translated by Philemon Holland

Your outlook upon life, your estimate of yourself, your estimate of your value are largely colored by your environment. Your whole career will be modified, shaped, molded by your surroundings, by the character of the people with whom you come in contact every day… – Orison Swett Marden

The sun, the moon and the stars would have disappeared long ago… had they happened to be within the reach of predatory human hands. – Havelock Ellis, The Dance of Life, 1923