"Jingjing is ordinary girl from an ordinary family, she has her simple happiness and simple ideals, " Ms. Zhang said.

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Their time in Corfu was mainly one of simple happiness: isolated, primitive, strangely serene, removed from the wider reality of international events.

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Overall then there is good evidence that several simple exercises increase happiness and decrease depression.

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And we sometimes complicate feeling the simple emotion of happiness.

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"When we work together we can achieve our goal, and our goal is simple: peace and happiness in this world, " she told Ban.

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"Be happy, love Baba, " he signed them, as if the attainment of happiness were as simple as that.

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But it also tells me we have to work even harder to close the gaps that still exist, and to uphold that simple American ideal: we are all equal and deserving of the chance to pursue our own version of happiness.

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