What are special purpose lenses?

Famous quotes containing the words special purpose, special, purpose and/or lenses:

    An indirect quotation we can usually expect to rate only as better or worse, more or less faithful, and we cannot even hope for a strict standard of more and less; what is involved is evaluation, relative to special purposes, of an essentially dramatic act.
    Willard Van Orman Quine (b. 1908)

    A special kind of beauty exists which is born in language, of language, and for language.
    Gaston Bachelard (1884–1962)

    God sent children for another purpose than merely to keep up the race—to enlarge our hears; and to make us unselfish and full of kindly sympathies and affections; to give our souls higher aims; to call out all our faculties to extended enterprise and exertion; and to bring round our firesides bright faces, happy smiles, and loving, tender hearts.
    Mary Botham Howitt (20th century)

    Life is a train of moods like a string of beads, and, as we pass through them, they prove to be many-colored lenses which paint the world their own hue, and each shows only what lies in its focus.
    Ralph Waldo Emerson (1803–1882)