Quotation:

 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)

 Mark Twain quotes (American Humorist, Writer and Lecturer. 1835-1910)

 Richard J. Needham quotes

 David Brinkley quotes (American television Journalist, 1920-2003)

 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)

 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)

 Chinese Proverbs quotes

 Henry Wadsworth Longfellow quotes (the most popular American Poet in the 19th century, 1807-1882)

 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)