The Futile Pursuit of Happiness

''We don't realize how quickly we will adapt to a pleasurable event and make it the backdrop of our lives. When any event occurs to us, we make it ordinary. And through becoming ordinary, we lose our pleasure.''

It is easy to overlook something new and crucial in what Wilson is saying. Not that we invariably lose interest in bright and shiny things over time -- this is a long-known trait -- but that we're generally unable to recognize that we adapt to new circumstances and therefore fail to incorporate this fact into our decisions. So, yes, we will adapt to the BMW and the plasma TV, since we adapt to virtually everything. But Wilson and Gilbert and others have shown that we seem unable to predict that we will adapt. Thus, when we find the pleasure derived from a thing diminishing, we move on to the next thing or event and almost certainly make another error of prediction, and then another, ad infinitum.

NY Times Article