This describes something that doesn't deplete the way we assume grace should. It isn't grace dispensed carefully from a finite supply, rationed out to whoever asks first; it's grace replacing grace, wave after wave, drawn from an actual fullness rather than a balance running down. That fullness isn't an abstract divine attribute floating apart from a person — it's Jesus specifically, the same man the rest of this Gospel follows through a wedding, a funeral, arguments with religious leaders, and eventually a cross. The text doesn't explain how the grace is mathematically possible — it simply asserts it, repeatedly, as the ordinary way this particular person operates. That's a real correction to how most of us actually live: keeping a mental ledger of how much grace we've already used up, hesitating to ask again. This verse assumes the opposite — that grace was never metered in the first place.