I'm trying to fill in the gaps in the author's thinking, but I imagine it something along the lines that keeping you "aged" 25 requires resources. So time is so

I'm trying to fill in the gaps in the author's thinking, but I imagine it something along the lines that keeping you "aged" 25 requires resources. So time is sort of a proxy currency for the resources required to keep you alive. If you run out of time you don't have anything to purchase the resources to keep you living.