In 2007, at age 52, I was forced to retire overnight. An MRI had revealed a tumor, the size of a large eggplant, sitting on my pelvis. In 98% of these cases, my oncologist told me, bone tumors are secondary cancer. He estimated that I had about six months to live.

But after two successful operations, I took a few months to recuperate on crutches and learn how to walk again. After my near-death experience, I had been in retirement for 10 years. I found myself bored, restless and stuck. My enthusiasm and energy diminished. My mental health suffered.