/ http://www.slideshare.net/images/logo.gif / 狠狠撸Share feed for 狠狠撸shows by User: RosaBlanch https://cdn.slidesharecdn.com/profile-photo-RosaBlanch-48x48.jpg?cb=1522992305 I do not think that there is any other quality so essential to success of any kind as the quality of perseverance. It overcomes almost everything, even nature. John D. Rockefeller (1839-1937, American industrialist, philanthropist, founder Exxon