They had mistaken his silence for absence.

It was the last and largest instance of the error he had warned me about my whole life, and he had, I now understood, spent his final year setting a trap inside it.

There is something almost unbearably poignant to me about that, when I let myself think about it fully.

Picture my grandfather, in the last year of his life, old and slowing, surrounded by a family that had decided he was finished — that spoke about him in the past tense while he was still in the room, that patted his hand and exchanged looks over his head and helped themselves to his company because they were certain the old man would never know or never remember.

And picture him letting them.

Not that he could not have stopped them — he could have, at any moment, with a single phone call, revealed that he still held every card — but because he understood something they never would, which is that the surest way to know what people truly are is to let them believe they are unobserved.