John Piper challenges fellow baby boomers to forego the American dream of retirement and live out their golden years with a far greater purpose in mind.

They say it's a person's reward for all those years of labor. "Turn in your time card and trade in your IRAs. Let travel plans and golf-course leisure lead the way." But is retirement really the ideal? Or is it a series of poor options that ignore a greater purpose-and will kill a person more quickly than old age?

John Piper responds: "Lord, spare me this curse " And his resounding message is for anyone who believes there's...