Leon Trotsky quotes (Russian Communist theorist and agitator, a leader in Russia's October Revolution in 1917. 1879-1940)
John Quincy Adams quotes (American 6th US President (1825-29), eldest son of John Adams, 2nd US president. 1767-1848)
Napoleon Hill quotes (American author, 1883-1970)
Mahatma Gandhi quotes (Indian Philosopher, internationally esteemed for his doctrine of nonviolent protest, 1869-1948)
Ralph Waldo Emerson quotes (American Poet, Lecturer and Essayist, 1803-1882)
Soren Kierkegaard quotes (Danish Philosopher and Theologian, generally recognized as the first existentialist philosopher. 1813-1855)
Leonardo da Vinci quotes (Italian draftsman, Painter, Sculptor, Architect and Engineer whose genius epitomized the Renaissance humanist ideal. 1452-1519)
