The idea that human mind should be understood as a representational device is often associated with the philosophy of Descartes, Locke, Hume and, of course, Kant, perhaps the most sophisticated and influential of them. According to the most widespread interpretation of this perspective, thought has a representational dimension and the main role of language is to represent the world, to reflect the reality. However, this idea was challenged in the second half of the XXth century by some philosophers such as Davidson and Rorty. According to them, human mind should not be understood as a representational device because our beliefs do not represent the world and our knowledge does not mirror the nature. The language is just a tool for coping with reality. In this context, the aim of this discussion is to look at the role of representation in the cognitive processes and in the foundations of knowledge and to find out which perspective would be able to offer a better understanding of the relation between the mind and the world.