Is happiness having what you want, wanting what you have, or both?

Some argue that happiness is not having what you want, but wanting what you have. This maxim sounds reasonable enough, but can it be tested, and if so, is it true?

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<p><a href="http://www.physorg.com/news128600238.html">Is happiness having what you want, wanting what you have, or both?</a></p> <p>Some argue that happiness is not having what you want, but wanting what you have. This maxim sounds reasonable enough, but can it be tested, and if so, is it true?</p>