The meaning of theory comes from the Greek language which means to see or pay attention. From this it can be interpreted that theory is a view or perception of what is happening. As for the understanding of theory from the other side, namely, theory is a form of statement that answers questions or attempts to give meaning or describe or explain the causes and effects of a phenomenon that occurs. Theory is a statement that connects concepts logically. Theory is the most common form of explanation that tells us why something happened and when something could be expected to happen. The way how one looks at a phenomenon as well as a description of the situation and the relationship between its parts. Judging from the way it works, the theory is generally simple and simple, the meaning of simple here is that the theory should consist of only one explanatory variable, however, with one variable it can already be used to explain various cases.
The concept is the abstraction of an object or symbol that interprets phenomena. Because it is only in the form of abstraction, the concept is not intended to explain, but rather describe reality. For example the concept of a tree is a plant that has roots, stems, branches, twigs and leaves.
Theory is different from the concept, because the concept is the raw material of theory. The concept is limited to asbstraction from reality not cause and effect. Therefore, if the theory functions to explain phenomena, the concept simply describes phenomena.
