Quote: Source of learning Cultus 18 September, 2013 QuotesBill Gates, Education, Forbes, Giving Pledge, History, Mark Zuckerberg, Microsoft, Steve BallmerAdd a Comment “Your most unhappy customers are your greatest source of learning.” ~ Bill Gates Did you find this useful? Feel free to bookmark or post to your timeline.TweetMorePrintRedditShare on TumblrPocketTelegramWhatsAppEmailLike this:Like Loading... Related