with me in phlegm de montebello and martin gayford.e magic of art and understand it and appreciate it more and you do it through this dialogue between the two of you and you do it in such an interesting way. who started this? whose idea was this. >> i suppose the idea e vaulted? first of all we met and we were at a restaurant over the seine from the louvre. we've got a couple chapters. and we started off we thought we'd have conversations about what is a museum. and then philippe i think suggested it be more fun and fresher to just go to galleries and respond to the works as we were partners. >> that's true. because i tend to look at museums as containers of groups of arts. and the contents interested me more than the container. so we looked at art and we talked about it. we would discuss it. and the whole idea is that our reactions, our response to works of art were things that could be translated at least in part into words and conceivably helpful, useful for the reader. >> rose: did the two of you find that there's some basic differ

. >> rose: we continue this evening with philippe de montebello and martin gayford. their book is called rendezvous

martine montebello and gayford. great to know that when you look at a piece of art, so much goes into it and he gives you an informed sense of what has turned on two people about the joy of looking at art and understanding art. back in a moment. stay with us. ♪ >> nicholas kristof and sheryl wudunn are here. they became the first married couple to win a pulitzer prize in journalism for their coverage of the tiananmen square protests in 1990. their 2009 book "half the sky" argued that the oppression of women worldwide is the paramount moral challenge today. bill clinton says there is no one who better clarifies the social challenges of our times or the moral imperative to help meet them. their latest book looks at the art and science of giving. it is called "a path appears." i am pleased to have nicholas kristof and sheryl wudunn back at this table. welcome. >> thank you. >> good to be back. >> tell me how this came about because we were talking beforehand and we both acknowledged that a lot of people want to do good