What can be said at all can be said clearly; and whereof one cannot speak thereof one must be silent.#
Just as we cannot think of spatial objects at all apart from space, or temporal objects apart from time, so we cannot think of any object apart from the possibility of its connexion with other things.#
The famous quote above from the Tractatus Logico-Philosophicus just means that the categories we use to make sense of the world are part of us, and not part of the world. The boundaries that we draw around classes of objects – this is a chair, and that is not – . . .