Duino's Elegies marks the moment of highest poetic creativity in the work of Rainer Maria Rilke (Prague, 1875-Valmont, 1926), one of the greatest German-language poets of modern Europe. The lyrical intensity of this poetry, as well as the mysterious inner world that inhabits it, have been the object of attention and study by some of the most outstanding philosophers and writers of our time, such as Martin Heidegger, Maurice Blanchot, Romano Guardini, Hans-Georg Gadamer or George Steiner. This book brings together two essays that discuss Rilke's poetry, taking as a starting point the "Ninth Elegy", in which the poet accounts for the tension between what is sayable - as an experience of the limits of what is expressible in the human being - and that unspeakable, ineffable and invisible that eludes our gaze. This book wants to be a contribution, perhaps untimely, to the already long tradition of readings on Rilke's work carried out from the Hispanic cultural field.