Dr. Carl Sagan quotes (American Astronomer, Writer and Scientist, 1934-1996)
Albert Einstein quotes (German born American Physicist who developed the special and general theories of relativity. Nobel Prize for Physics in 1921. 1879-1955)
Confucius quotes (China's most famous teacher, philosopher, and political theorist, 551-479 BC)
Bertrand Russell quotes (English Logician and Philosopher 1872-1970)
Tao Te Ching quotes