and so, we are moving toward a just -- we the tv is -- when talking about youtalk about tv, are talking about three inch tv or seven inch tv or 25 inch tv? convergence of the tv ad tablet and iphone into devicesmless set of that all can play the same content at any time depending on sort of what you are doing at the time, it is an amazing change that we are beginning to get our hats are round. >> "dogfight: how apple and google went to war and started a revolution" is the name of the book and the author is fred vogelstein of "dogfight: how apple and google went to war and started a revolution" magazine. >> some people in the movement decided to take the cause of marriage equality to the supreme court. that is what i chose to write about. that itlly gratified does cause a stunningly intimate story. that is the story. that is what i set out to do. i was fascinated. what if you like to be part of a major civil rights litigation case? both high profile and controversial. what does it feel like? what was the judge thinking as he considered the evidence? it turned out he was gay and one the m

what youtalk about -- mean when you talk about honesty in music.mean by the honest the music having to be honest? >> finding the emotional truth. it is important. otherwise, you are not communicating with the audience. doing,s just what i am that will not hit home and there is an emptiness to it. that is what i am trying for. i am always striving to find the most emotional moment in everything i do. how to find that line. you start crying and you cannot sing well. tavis: have you done performance where you have trip yourself up emotionally? >> sure. sure. you have to rein it in to keep going. that is a great fine line to the on. .- be on tavis: because you have performed all over the world, give me two or three takeaways that you have learned from performing before live audiences. i think the answer applies to anyone who stands in front of a live audience. what are some of the lessons you have learned? >> we have two more performances and i suffer a lot to perform. i am really one of these crazy people who has to suffer to perform. tavis: after all