An unqualified claim in a narrow room
The verse says "all things" without a single limiting word. Yet everything Paul has just described — hunger, plenty, humiliation, abundance — is a list of material circumstances. The widest possible claim stands inside one of the narrowest possible contexts.
A signed blank check is unusual precisely because most checks specify what they cover. This verse looks like a blank check. "All things" carries no adjective, no subordinate clause, no limiting phrase anywhere in the line itself. The grammar does not say 'all things that matter' or 'all things within my calling.' It says all things.
And yet the room the verse stands in is very small. The surrounding verses name being abased, abounding, going hungry, suffering need — a short list of variations on a single theme: how much money and food Paul had at a given moment. The context is almost domestic in its specificity.
So the verse holds two things in tension simultaneously: a claim with no ceiling, set inside circumstances with a very low one. The text does not resolve which governs the other. It simply lets them stand together — the unrestricted statement and the ordinary, even modest, situation that prompted it.