When I listened to the TED talk last week by Martin Seligman, he talked about levels of happiness. He talked about three levels that can lead to a happy life. The Pleasant Life - where you get as many pleasures as you can get from external sources, the hedonistic lifestyle. The Good Life - where he talks about stepping into the flow, you become absorbed in what you do and time stops and you become unaware of your feelings. The ultimate is of course the Meaningful Life, where you know your strengths and you use in the service of something higher than you are.
I have definitely have been in the Good Life today, time stopped and I became thoroughly absorbed in my art making, music was playing and I stopped worrying about what I was or wasn't feeling.
So I have come out of my studio at half six on a Sunday evening having been lost in the flow all day, and it feels like a very good life.