The world is the totality of facts not things. Here's something I posted on Quora. This was written to answer the following question:
What did Ludwig Wittgenstein mean by "the limits of my language are the limits of my world"?
To answer this question one needs to have a good understanding of the *Tractatus* and what Wittgenstein was trying to accomplish. There are three main ideas in the *Tractatus*, and these three ideas will help answer your question.
First, though, one must understand what Wittgenstein is trying to accomplish in the *Tractatus*. Wittgenstein’s goal is to investigate the essence of language, that is, how it functions, and how it is structured. Second, he assumes that the function of language is to describe the world, and he assumes that the structure of language is revealed by logic. Why did Wittgenstein think that logic would reveal the structure of language, and reveal how language is connected to the world? We have hints here and there, but it seems that not only did he believe that logic lay at the bottom of all science, but he also believed that there was something universal about logic (his idea of logic has ontological implications), a peculiar depth (PI 89). In fact, logic is one of the three main ideas behind his work in the *Tractatus*, the other two are language and the world.
Wittgenstein starts his investigation in the *Tractatus* with the world. The beginning statements of the *Tractatus* can be thought of as conclusions, which are required by his theory of language. There are two components of Wittgenstein’s theory of language, *the picture theory* and *the truth-function theory*. Wittgenstein believed that if we can talk about the world, then propositions must be logically connected with the world. In this way, the truth of a proposition is not connected with other propositions, but connected with the world. He called propositions that are directly connected with the world, *elementary propositions*. So you have propositions (complex propositions), which are made up of simpler propositions called elementary propositions that are directly connected to the world. Two questions that naturally arise, how are elementary propositions related to complex propositions, and how are elementary propositions logically connected to the world?
First, complex propositions are truth-functions of elementary propositions. Thus, if a complex proposition is broken down into elementary propositions, then the truth-value of the proposition is determined by the truth-value of its component parts (seen in truth-tables), namely, the elementary propositions that make up the proposition. Second, elementary propositions connect with the world in that they are pictures of atomic facts, which are the smallest constituent parts of facts.
Wittgenstein believed that his process of analysis, in terms of the structure of a proposition, must come to an end, but “…what will the end be?” (Nb p. 46). Once we have completely analyzed the proposition, that analysis will have the same complexity as its referent (Nb p. 46). The referent being facts in the world.
However, we are not done with propositions. Elementary propositions, according to Wittgenstein, have more basic parts, namely, a nexus of *names *(T 4.22). Do not think of names like pencil, cup, chair, etc, these kinds of names are not what Wittgenstein had in mind. For Wittgenstein a *name* is a primitive sign, and he uses the symbols x, y, and z to refer to them. These names cannot be dissected any further. They are, in one sense, the end result of the analysis, in terms of the elementary proposition.
So how do propositions correspond to facts in the world? Keep in mind that in Wittgenstein’s early philosophy he holds to the traditional view of language, that is, a name’s meaning is directly associated with the object it denotes (T 3.203). Thus, this is carried over into his thinking in the *Tractatus.*
The totality of facts* *are what make up the world (T 1.1). Facts are divided into atomic facts, just as complex propositions are divided into elementary propositions. There is a direct picturing correlation between an elementary proposition and an atomic fact. The elementary proposition, which is made up of *names*, has its counterpart in the world of facts, because the smallest constituent part of a fact is an *object *(do not think of objects in the normal sense), objects for Wittgenstein are simple, just as names are simple.
The elementary proposition is in touch with the world via *names*, which are in direct contact with the world via *objects*. The arrangement of names in the elementary proposition must have the same logical structure as the arrangement of objects within the atomic fact. If it has the same arrangement, then it’s true, if not, it’s false.
Propositions show their sense by their logical structure, and if that sense is correct or true, then it matches the facts in reality, or it mirrors reality. Think of a picture, a picture has a sense, the sense is given by the arrangement of things in the picture, but that sense need not match reality (the way things are), the same is true of a proposition according to Wittgenstein’s early philosophy.
So how does all of this answer your question? Well, for early Wittgenstein language is completely descriptive, that is, it attempts to describe the world, either truly or falsely. The limits of language, or what can be said, is the limit of our world. Things that have sense happen only within the limits of language. Senseless propositions attempt to say something about the limit of language; and attempts to go beyond the limits of what can be said, result in nonsense. It follows from all of this that the limit of language is the limit of our world.
The logical positivists misunderstood Wittgenstein’s *Tractatus* in that they thought his work was anti-metaphysical, on the contrary, he thought that philosophical propositions that try to go beyond the world were attempts to say what cannot be said. They are attempts to transcend language, and thus the world. And although Wittgenstein tried to set out what can and cannot be said (in terms of propositions), he did think that that which transcends our world was important; and although that which transcends the world cannot be stated, as Wittgenstein tried to show, the mystical could be shown.
Hope this helps.