People regard their environment in terms of objects. Therefore it is simple to think in the same way when it comes to designing a model.
Source, in full
p. 42; cited in: Sten Carlsson and Benneth Christiansson. (1999) "The Concept of Object and its Relation to Human Thinking: Some Misunderstandings Concerning the Connection between Object-Orientation and Human Thinking." Informatica, Lith. Acad. Sci. 10.2. p. 147-160.