William James quotes (American Philosopher and Psychologist, leader of the philosophical movement of Pragmatism, 1842-1910)
Nathaniel Branden quotes
Herbert A. Otto quotes (American Author, leader of the human potential movement )
Norman Vincent Peale quotes (American Protestant Clergyman and Writer, 1898-1993)
Henry David Thoreau quotes (American Essayist, Poet and Philosopher, 1817-1862)
Charles Darwin quotes (English Naturalist and Author of the theory of evolution by natural selection. 1809-1882)
Johann Wolfgang von Goethe quotes (German Playwright, Poet, Novelist and Dramatist. 1749-1832)
John Maxwell quotes (American Author and motivational speaker )