Albert Einstein quotes (German born American Physicist who developed the special and general theories of relativity. Nobel Prize for Physics in 1921. 1879-1955)
Voltaire quotes (French Philosopher and Writer. One of the greatest of all French authors, 1694-1778)
Friedrich Nietzsche quotes (German classical Scholar, Philosopher and Critic of culture, 1844-1900.)
Kahlil Gibran quotes (Lebanese born American philosophical Essayist, Novelist and Poet. 1883-1931)
Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)
Socrates quotes (Ancient Greek Philosopher, 470 BC-399 BC)
St. Thomas Aquinas quotes (Scholastic philosopher and theologian, 1225-1274)
