“Your most unhappy customers are your greatest source of learning.”– Bill Gates Related Quotes “Never stop learning knowledge doubles every fourteen months.”– Anthony J. D’Angelo “You have to grow thick skin and that only comes with time and learning.”– Karlie Kloss “I believe that every role that I have done this far has had quality and content. My roles have been very demanding and every role has been a challenge and a learning experience that has helped me mature as an actress.”– Natasha Henstridge