The quest for truth arises when we talk about meaning in language. By truth we mean the logical truth which is to be understood in relation to obtaining and non-obtaining of states of affairs in the world. If we see Frege's account on truth, he holds that the word 'truth' is to be explained in terms of laws of truth. Further, he remarks that one could find the truth by affirming the pictures, ideas, statements, and thoughts. Considering the 'picture' as one of the assertions of truth, it is said that one cannot claim a picture is true unless there is an intention behind this. So, a picture must represent something and that is about the state of affairs of the world. All the states of affairs or facts of the world can be projected in the form of assertive propositions. Thus, it is claimed that truth of a proposition is determined in relation to the correspondence of a picture that it depicts.

In the Tractatus, Wittgenstein clearly points out that every proposition depicts a picture. A picture is essentially related with the proposition because it is essentially the sense that a proposition expresses. The sense of a proposition deals with the objects and non-objects of the phenomenal world. So, in a sense it gives us the knowledge of what the proposition is stating about. Thus for him, a picture depicts a fact. Since it depicts a fact, it states about the existence and non-existence of objects in the world. Hence, a correspondence relation exists between the picture of a proposition and the facts of the world, i.e., what the proposition is stating about.

According to Wittgenstein, 'a proposition is a picture of reality' (Tractatus, 4.021). It is so because each proposition depicts a picture for our understanding. Picture of a proposition is logically embedded with the proposition. So, it is stated that the sense of a proposition is same as the picture of a proposition. The picture of a proposition represents the situation, i.e., what the proposition is stating about. For example; "A bird is flying". What we understand from this proposition is that there is a living creature having two legs, two wings, having feathers, not walking on the soil as men do but flying in the air. This assumes that there is a picture in our mind when someone utters the sentence "A bird is flying". As a result, we understand the meaning of the proposition. Logically speaking, in order to understand the sentence "A bird is flying" it picturizes in our mind that there is an X such that X is a bird and X is flying. Thus every proposition depicts a picture, i.e., what the proposition is stating about. The picture of a proposition corresponds to the facts of the world and thus all sentences can be judged as either true or false. A sentence will be treated as true if the picture of that sentence corresponds to the facts of the world. On the other hand, it turns out to be false if the picture of that proposition does not correspond to the facts of the world.