Mark Twain quotes (American Humorist, Writer and Lecturer. 1835-1910)
Ralph Waldo Emerson quotes (American Poet, Lecturer and Essayist, 1803-1882)
David Viscott quotes
Abraham Lincoln quotes (American 16th US President (1861-65), who brought about the emancipation of the slaves. 1809-1865)
Norman Vincent Peale quotes (American Protestant Clergyman and Writer, 1898-1993)
Martin Luther King, Jr. quotes (American Baptist Minister and Civil-Rights Leader. 1929-1968)