  R.D. Tétreau calls attention to the fact that the invocation of the Ps-Dionysius is vague and somewhat deceptive. He notes that no specific text of Dionysius is cited. Furthermore the great Church Father is not mentioned again throughout the rest of the treatise and is not cited at all in the De intellectu and the De animatione caeli. E. Krebs in his study, Meister Dietrich: Sein Leben, seine Werke, seine Wissenschaft, notices that in the De animatione caeli Dietrich cites Boethius in establishing the procession of beings that marks his hierarchy. Dietrich, he argues, identifies himself with a particular school of Neoplatonists which sees the One as the ultimate and final principle of not only hierarchy but of created being itself. This school includes Proclus and the author or authors of the Liber de causis.