It is a joy to not know how much time you have left.

Knowing that would remove one of the great unknowns from life; and at our age it sharpens our sense of what is worthwhile and lasting, and what is transient. That in turn drives decisions about where to invest time and energy - just as it was for your Dad. Whilst we have different backgrounds, I can resonate with your Dad's later life of continuing to want to provide value (which at later life tends to be advice and capital); sitting by the pool drinking cocktails for years isn't my idea of a good time either.

If today was your last day, what would you do today? That focuses the mind on priorities like nothing else.

Great post - thanks!