Full context:   Hugh of Saint Victor, in De scripturis et scriptoribus sacris, distinguishes anagoge from simple allegory as a kind of allegory. He differentiates in the following way: in a simple allegory, an invisible action is (simply) signified or represented by a visible action; anagoge is that "reasoning upwards" (sursum ductio), when, from the visible, the invisible action is disclosed or revealed. In a letter to his patron Can Grande della Scala, the poet Dante explains that his Divine Comedy could be read both literally and allegorically; and that the allegorical meaning could be subdivided into the moral and the anagogical.