"The time in jail was quite crucial. Of course, suffering embitters some people, but it ennobles others. Prison became a crucible that burned away the dross. People could never say to him: "You talk glibly of forgiveness. You haven't suffered. What do you know?" Twenty-seven years gave him the authority to say, let us try to forgive." - Desmond Tutu on Nelson Mandela http://www.theguardian.com/commentisfree/2013/dec/06/desmond-tutu-nelson-mandela