H. Jackson Brown, Jr. quotes (American best selling writer, author of Life's Little Instruction Book)
Erich Fromm quotes (German born American social Philosopher and Psychoanalyst, 1900-1980)
Robert Heinlein quotes (American science-fiction writer,1907-1988)
Emil Ludwig quotes (German Biographer and Writer who is internationally known for his many popular biographies, 1881-1948)