The whole new branch of psychology called "Positive Psychology," which has been trying to answer the question: What makes for a happy life? It looks like, so far, in the studies that have been done, that probably the most important contribution to have a happy life, is to have good, strong, meaningful relationships. After that, it's probably having the opportunity to experience flow by being engaged with life, in your job or other hobbies or whatever. If you take those two, you are pretty much on the way to having a happy life. For instance, -- this is a big study, with thousands and thousands of people -- they were asked, what makes them happy with their job. The single most important thing for being happy is to have a good friend at work. It's not how much you make, security, but have someone to share your experiences and feel comfortable. It doesn't cover a hundred percent because it doesn't cover job challenges and things like that, a boss is quite important too. If you look at one single thing, it's having a good friend. This is about happiness in general, you need a good relationship, and then you need something challenging to do. Not just contributing but proving that you are good at something.