Mine, Yours?

You say something is "yours" but really, is it? What does that mean? Whatever it means, it means not yours truly fixed in space and time. We can understand this on many levels -- that "mine" and "yours" are both perceptions in a place and time, and not absolute. Because everything is always moving and changing, no thing is constant, and thus all that can be ours is in an instant only a concept and not a thing in the first place.