Ralph Waldo Emerson quotes (American Poet, Lecturer and Essayist, 1803-1882)
Albert Einstein quotes (German born American Physicist who developed the special and general theories of relativity. Nobel Prize for Physics in 1921. 1879-1955)
Judith Hayes quotes
William Bragg, Sr. quotes
Johann Wolfgang von Goethe quotes (German Playwright, Poet, Novelist and Dramatist. 1749-1832)
Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)
Bertrand Russell quotes (English Logician and Philosopher 1872-1970)
Isaac Newton quotes (English Mathematician and Physicist, "father of the modern science", 1642-1727)
Helen Keller quotes (American Author and Educator who was blind and deaf. 1880-1968)