Abbot Ratgar (802–817) sent the gifted scholar to Einhard at the court of Charlemagne, where he most probably learned the art he employed later in decorating with pictures the western apse of St. Salvator, the so-called Ratgerbasilica, to which, in 819, the remains of Saint Boniface were transferred.
When Rabanus Maurus was made abbot (822), Candidus (who describes himself as a magister or teacher) may have succeeded him as head of the monastic school of Fulda.
Yet this honorable function gave him reason to complain of the lack of intellectual conversation in his loneliness far from the monastic community of Fulda.
In his Vita Aegili abbatis Fuldensis, he implicitly promotes his candidacy by showing his expertise in all questions of monastic life.
But, as Christine Ineichen-Eder has pointed out, the so-called "Dicta de imagine mundi" or "Dei", twelve aphoristic sayings strung together without logical sequence, are the work of Candidus-Wizo, a pupil of Alcuin.
and of a letter concerning the question, Quod Christus dominus noster, in quantum homo fuit, cum hic mortalis inter mortales viveret, Deum videre potuisset.
[3] The Vita Aegili is an outstanding specimen of biography from the Carolingian Renaissance and an important source for the monastic reform of Benedict of Aniane.
He also describes two churches built at Fulda: first St. Salvator, the so-called Ratger-basilica, completed and augmented with two crypts by the monk Rachulf and dedicated 1.
Candidus also recounts the dedication ceremony of St. Salvator and the translation of the relics of St. Boniface from his tomb in the centre of the church to his new crypt in the western apse.
The source for the Vita's lost illustration to this hymns may have been the aforementioned apse picture, which Candidus claims he executed, and which is probably reflected in three sacramentary manuscripts of the Ottonian age (Göttingen, Niedersächsische Staats- und Universitätsbibliothek 2° Ms. theol.