Are you a life-long learner? How do you keep your thinking fresh and always adaptable for life ahead?  It's easy once we become settled into our careers and family to-do lists, to keep a steady course. But it's only after years have passed, do we realize the gap we've allowed to grow.  This author prefaces his wisdom with a story of Agatha Christie and how she embraced the uncertain and gained more than what she bargained for.