4.03 A sentence must communicate a new sense with old terms.
A sentence communicates a state of things to us, so it must be essentially connected with the state of things.
And the connection is just that it is its logical picture.
A sentence says something only insofar as it is a picture.
So propositions picture states of things. This is not new. It must be essentially connected with the relevant state of things, which sounds metaphysical, but in fact the connection in question is precisely, merely, that it pictures it. Logically, whatever exactly that might mean.