One of the fundamental issues of moral philosophy applied to our daily lives is the relationship between truth and philosophy and, as such, it is appropriate that Plato, as one of the founders of Western philosophy attempts to face them. Before we can fully understand how Plato understands this interconnection, it is imperative to understand how Plato understands truth and happiness as separate entities: that is, what is truth and what is happiness? Plato never explicitly states what the truth actually is; rather, the closest he gets is to describing the characteristics of truth (in much the same way he flirts with the definition of justice all the way back to the Republic). One of the central characteristics of truth is its singular nature. There is only one truth, for Plato, which leaves room for the possibility that it can be found in many forms, all connected by a single thread. Happiness, an idea with which most of us believe we are much more familiar, would derive from the fulfillment of one's duty, as stated in the Republic. Having proceeded in this way, it then becomes easier to specify how Plato sees the relationship between truth and happiness. For the philosopher there is one truth and there is only one way to find happiness; as such, truth and happiness are somehow subsumed into one another: happiness, the achievement of which is most often the goal of everyday life, is found in truth. Proceeding in the same way with Plato's successor, Aristotle, brings us to a slightly different conclusion due to the fact that Aristotle does not agree with Plato's vision of truth, approaching it with a more dogmatic perspective, or with the Plato's idea of ​​happiness, which he criticizes for being too centered on...... half of the paper……l as an integral part and subject to the needs of the State. Truth and happiness do not arise from accepting one's position as a manual worker or tradesman, but from a life of contemplation and reflection. In this sense, it is as if the modern reader had to choose between the lesser of two evils: Plato, with his invasive vision of happiness and the State, and Aristotle, with his very aristocratic idea of ​​happiness and truth. Aristotle does not believe that individual happiness should be sacrificed for the good of the community. In this sense the two great philosophers diverge on the primary unity of political life. For Plato, the community and its will reign supreme over the lives of its inhabitants. For Aristotle, the individual and the family are the necessary and constitutive parts of a larger polis, an idea he articulates more explicitly in Politics..