Nigeria, June 7 -- Reflections at 50 on grace, responsibility and the privilege of being carried.

There comes a point in life when achievement begins to matter less than purpose. A point when the question is no longer, "What have I accomplished?" but "What am I leaving behind for others?"

As I approached my fiftieth birthday, I found myself confronting that question with unusual intensity. Not because fifty is a magical number. Not because birthdays demand profound reflection. But because milestones have a way of forcing us to pause long enough to ask ourselves whether we are living the life we were intended to live.

For me, that reflection led to a simple but deeply consequential question: What do we owe those coming behind us. Over t...