Albert Einstein quotes (German born American Physicist who developed the special and general theories of relativity. Nobel Prize for Physics in 1921. 1879-1955)
Aristotle quotes (Ancient Greek Philosopher, Scientist and Physician, 384 BC-322 BC)
Carl Friedrich Gauss quotes (German mathematician 1777-1855)
Bertrand Russell quotes (English Logician and Philosopher 1872-1970)
Sydney Smith quotes (English Clergyman, Essayist and Wit, 1771-1845)
William James quotes (American Philosopher and Psychologist, leader of the philosophical movement of Pragmatism, 1842-1910)
Jim Pelley quotes
Henry David Thoreau quotes (American Essayist, Poet and Philosopher, 1817-1862)