Friedrich Nietzsche quotes (German classical Scholar, Philosopher and Critic of culture, 1844-1900.)
Albert Einstein quotes (German born American Physicist who developed the special and general theories of relativity. Nobel Prize for Physics in 1921. 1879-1955)
Bertrand Russell quotes (English Logician and Philosopher 1872-1970)
S. Gudder quotes
Plato quotes (Ancient Greek Philosopher He was the world's most influential philosopher. 428 BC-348 BC)
Henry David Thoreau quotes (American Essayist, Poet and Philosopher, 1817-1862)
