Why did little Timmy cry when grandpa talked to him in his last moments on his death bed?

Why did little Timmy cry when grandpa talked to him in his last moments on his death bed?

Because, so grandpa told him, "every single one of us will die and have our consciousness wiped out forever from existence. Never to feel anything again. All our lives and memories will be forgotten, for some in just one generation, for others in a few more. But even the most famous people will fade either when our sun burns out or the heatdeath of the universe.