For those who suffered mostly misery in this life, who died as infants or young children, who never really had an opportunity to know true joy or love, the afterlife offered a second chance and a way to address the unfairness of this life.

BBC: A Point of View: Would you want to live forever?

Ms. WALKER: I hold true to the joy, the wonder of the whole thing.

NPR: Walker's 'The Color Purple' Opens on Broadway

This is true even if their growth rate slows somewhat, so Joy is a good way to play the energy market in China.

FORBES: Three Moneymakers From China's Slowdown