The greatest enemy of progress is the illusion of knowledge. John Young More Quotes by John Young More Quotes From John Young It’ll keep me safe — you don’t have to take the risk of getting out there and trying to find heroin or using needles. John Young health If you want to see an endangered species, get up and look in the mirror. John Young mirror see look you Twentieth century man must boldly reach out... And purposefully strive to discover the hidden secrets of our universe. John Young hidden secrets man universe
