Non est in sermone regnum Dei: Did Isaac of Stella know the writings of Maximus the Confessor?

In this paper, I consider the possibility that Abbot Isaac of Stella may have known Maximus the Confessor's writings directly or, more likely, indirectly, thanks to Scotus Eriugena's translations. Of all the texts preserved from Isaac, I think I can best argue for this (possible) influence based on the Epistola de anima ad Alcherum and the Epistola de canone missae, recently published in the prestigious series Sources Chrétiennes. Even though the Cistercian abbot conceals his sources very well, rarely citing clear sources such as Augustine and Dionysius the Areopagite, I nevertheless believe that we can detect some clues leading to the conclusion that he was familiar with the texts of Eriugena and, by extension, with the teachings of Maximus the Confessor.