Aging is a complicated thing, and no two people age in the exact same way. You might encounter someone in their seventies who seems decades older; you might also take in a jazz performance by a centenarian saxophone player. A few weeks ago, I saw Willie Nelson, still crooning and playing the guitar at the age of 92. Not everyone has the same support infrastructure as a touring musician - but that doesn't mean there aren't applicable lessons to be learned here.
This column has previously cited or recommended books on security, risk and leadership. Having just submitted a book manuscript to a publisher that explores the confluence of those three topics, I discovered that I drew most inspiration for my approach and analysis from works that don't directly relate to any of these subjects. (I should note that I tapped this column for content that I updated or more fully developed in the book).