Not long ago, my mentor and friend, Warren Bennis, gave me a very generous unsolicited compliment.  I hemmed and hawed and went on about how he didn’t need to say that and really it was nothing. Warren in his loving, but not suffering foolishness (or false modesty) manner, stopped me and said, “Mark, when you hear something like I just said, there is only a single two-word response: ‘Thank you.'”