§138

The idea that the meanings of words fit together in a proposition could be connected to the Augustinian picture. If the meaning of a word is the object it refers to then we could speak of objects fitting together, or we might think that meanings fit together in some way that runs parallel to the way that objects fit together.

An objection to saying that the meaning of a word fits the sense of a sentence is that the meaning is the use of the word and we can't make sense of uses fitting together. However, Wittgenstein then raises a philosophical problem. If the meaning of a word is its use then it seems difficult to understand how we could understand the meaning of a word in an instant. What we understand - the meaning - is something grasped in an instant byt the use of the word is extended in time and so it seems that meaning cannot be use.

(And perhaps it could be said that the Augustinian picture gets around this problem. - We can grasp the meaning of a word in an instant perhaps by perceiving the corresponding object or by forming an image of it in our minds).