Abigail Adams quotes (American letter Writer and First Lady (1797-1801), wife of John Adams, 2nd US president, and mother of John Quincy Adams, 6th US president, 1744-1818)
Rene Descartes quotes (French Mathematician, Philosopher and Scientist, 1596-1650)
Robert Frost quotes (American poet, 1874-1963)
David Dunham quotes
Dr. Carl Sagan quotes (American Astronomer, Writer and Scientist, 1934-1996)
Galileo Galilei quotes (Italian natural Philosopher, Astronomer and Mathematician who made fundamental contributions to the development of the scientific method and to the sciences of motion, astronomy and strength of materials. 1564-1642)
Lao Tzu quotes (Chinese taoist Philosopher, founder of Taoism, wrote "Tao Te Ching" (also "The Book of the Way"). 600 BC-531 BC)
Pablo Picasso quotes (Spanish Artist and Painter. 1881-1973)