YESTERDAY MORNING, I spoke at career day at the Philadelphia school where my daughter teaches. My two fellow panelists were a city planner and a fundraiser for a local ballet company. What did we tell the 11th grade kids? Interestingly, all three of us focused on the same four themes:

You’re unlikely to have a single career. Instead, you’ll switch direction as you discover what you’re good at, the world changes around you and you grow weary of your current job.