As it is triggered when a given situation appears better relative to a previous state, no external conditions whatever can account for lasting happiness.

The documentary follows students on three continents as they search for the meaning of "lasting happiness".

But don't be hoodwinked into thinking that gifts and other offerings are the way to bring lasting happiness.

Follow these five steps to increase your chances of finding lasting happiness.

Yet this joke, our culture tells us, is now the secret to true and lasting happiness.

I have to give more than one woman a chance for true and lasting happiness.

Individuals derive a sense of identity from these thoughts, and it becomes impossible to achieve lasting happiness.

And certainly, we begin to ask ourselves where it is that we can find lasting happiness.

The challenge both men face in 2008 is to acquire enough of the other quality to attain lasting happiness with the country.

But, as her story demonstrates, women in America are not guaranteed lasting happiness simply by marrying the American dream.