The superior philosophical approach of writing begins with Plato. In the dialogue «Phaidros» which underlies the philosophy of writing, the character Socrates tells the myth about the invention of writing by Theuth. Throughout history many comments were written about this dialogue. According to Derrida, for example, the dialogue «Phaidros» is the whole history, the philosophy itself. From Martin Heidegger’s point of view this dialogue is essential through the understanding of what can be seen, the truth, and the essence of existence which are passed out of hiding and made visible, this being true for the process of writing too. Henry Joly who interprets only a part of this paper finds that the passage in question is merely a continuation of the Plato’s theme of the inferiority of the written language and the superiority of the spoken language. Of all the ancient comments that were made on this dialogue, the most important seems to be that of Hermeias Philosopher. Several methodological indications in his comment can help us understand the passage about writing: 1. Two aspects of the purpose of this dialogue could be distinguished: on the one hand it's about love, on the other, about the rhetoric, in other words, it is about the two movements of the soul: one that concerns the composition of the inner soul and its tendency to perfection, and the other that refers to an outside flow of the soul, directed to another; 2. Plato used to examine antithetical answers and questions in order to find and verify the truth. By this method, he leads us from appearances to the true spiritual and intellectual beauty; 3. When Plato speaks about something, he refers to the three aspects of existence: essence, potency and deed.