This thesis examines the texts of the first greek philosophers, especially the Xenophanes and Parmenides fragments. It s necessary to say that we will deal with the texts because it s very common, in face of the incomplete state of their ipissima verba, that scholars try to overcome the difficulties by reading secundary fonts and by interpretations of late-period authors. In this way, they not only separate the form and the content of the philosophers messages, but also alienate the messages from the specific context in which they were formulated. To overcome these problems, we will examine the philosophers fragments by their own historical context and by their concrete and specifics ways of communication. Under this perspective, it will be demonstrated that their teachings was more ocupied with an efforce to depurate and to improve the language and the tradition in which they were inserted than with a systematic although incipient refletion concerning reality s first basic principles.