THIS IS THE ORIGINAL 1956 RECORDING OF THE STRANGEST SECRET, WRITTEN AND RECORDED BY EARL NIGHTINGALE. THIS STRANGEST SECRET RECORDING IS THE SEEDLING FROM WHICH THE PERSONAL DEVELOPMENT INDUSTRY HAS GROWN.  EARL NIGHTINGALE WAS THE EARLY PIONEER OF THE INDUSTRY AND BECAME THE WORLD RENOWNED SUCCESS AUTHORITY ON HOW TO LIVE MORE SUCCESSFUL LIVES.