Language, according to Heidegger, is not an available tool which makes the communication between human beings possible, in other words, language cannot be reduced to a means of expression. However, in the technical age, language is seen exclusively as a means that serves the purpose of exchanging information. Therefore, the philosopher suggests that in order to understand language it is necessary to embark upon into the speech of language rather than the speech of men. And, for Heidegger, language speaks first in poems. Yet, men can only say, or rather, show and reveal, that what is shown to him. For that reason, before becoming a speech, poetry is, for most of its time, a hearing, an act that is only possible when men understand the word not only as sign referring to a meaning but also as a permanent shelter capable of seizing the very existing of things from the immense forgetfulness. For Heidegger, it is this speech and, at the same time, the hearing of this immense silence which allows the human being to become mortal, preventing him, in this way, from remaining frozen in the idea of the rational animal.