Author Jason Jack on "Spend or Save"

(Note: Welcome back, interneters! I hope all of you had a safe and fun Thanskgiving. I postponed my Friday blog given the holidays, but we're back today with some more positive advice. Enjoy!)
Author Jason Jack, I really want to buy something--should I spend or should I save my money?-
We ought to live like we'll live until we're 100.
We ought to live like we'll die tomorrow.

We ought . . . to do both?

These premises might sound as though they contradict one another (and they may at times) but to...