system
Given the following post, respond as if you're commenting on Reddit:
human
In The Hobbit why is it that when Bilbo picks up something like keys or an object like a rock it stays visible yet when he draws his sword it remains invisible?

Same with his clothes, why does he not have to strip?
gpt
The ring of power, enhances those qualities that exist within the user. As a consequence, anything that is considered part of the user will be enhanced by the ring. Bilbo considers the sword and his clothes as part of himself (not physically but part of his character), but not simple objects like keys or a rock are unimportant to him and thus rendered visible.