"Replicatio sermonum" is the second part of the autobiographical trilogy written by the eremitical monk from the region of Bierzo (Iberian Peninsula) Valerius. He relates the sufferings, attacks of the devil and conflicts he was involved during his monastic life. The exact dates of Valerius life, as well as the dates of the composition of his works cannot be established; it can only be said that he lived and worked in roughly the second half of the seventh century. Apart from the autobiographical writings he composed six short works: De vana saeculi sapientia, Vita et epistola beatissimae Egeriae, De genere monachorum, Dicta beatum Valeri ad beatum Donadeum scripta, De Bonello monacho, and De caeleste revelatione. On Valerius of Bierzo see Aherne 1949, Collins 1986, Díaz y Díaz 2006, Martín 2011.