"Ever since happiness heard your name, it has been running through the streets trying to find you." -- Hafiz of Persia
Dan Gilbert, author of Stumbling on Happiness, challenges the popular belief that we will be miserable if we do not get what we want/plan for. Our "psychological immune system" lets us feel truly happy even when things don't go as planned. This is a great TED lecture, I highly recommend watching or simply listening to it.