John Young Born: September 24, 1930 Occupation: Astronaut Zodiac Sign: Libra Chinese Sign: Horse The greatest enemy of progress is the illusion of knowledge.- John YoungCollection: KnowledgeCopy Quote If you want to see an endangered species, get up and look in the mirror.- John YoungCopy Quote Twentieth century man must boldly reach out... And purposefully strive to discover the hidden secrets of our universe.- John YoungCopy Quote