There's never enough where nothing's left.

The proverb points out that sufficiency depends on having something available. Once a supply is gone, no amount of wishing can make it adequate.

It can also warn against treating a depleted resource as though it were still available. Further needs cannot be met from what has already been used up.

Use it when someone expects more from a supply that has run out, or when deciding whether remaining resources can meet a need. It emphasizes the limit imposed by having nothing left.