In 2002, Jonah played his last game for the All Blacks. He was 27. That's incredibly young to leave behind the thing that has defined and shaped your life, by which you have already achieved something so great that nobody expects you will surpass it.
But by what measure do we decide great achievements? As our memories of him were steadily narrowing to their inevitable Catt-centric end point, Jonah's life was opening out. As many of us learned for the first time on hearing the terrible news this week, he was a father to two boys, aged 5 and 6. Although we might always remember him as the greatest of all wings, those two boys won't.
The fact they probably won't remember much about him at all is a thing almost too sad to imagine.