by Matt HoganArchives, Motivational Quotes“I believe that the rendering of useful service is the common duty of mankind and that only in the purifying fire of sacrifice is the dross of selfishness consumed and the greatness of the human soul set free.” ~ John D. Rockefeller, Jr. Share this:Tags:Give Back QuotesGiving Back QuotesQuotes about GreatnessService Quotes previousPrevious PostnextNext Post