Liber de Causis (The Book of Causes)

has been gleaned from the doctrinal studies of his treatise. G.C. Anawati 31. and others have contended that, besides access to Proclus as the main source of the Liber Book (of Causes), the author had access to Plotinus' Enneads. Fr. Leo Sweeney 32., in his study of creation in the De causis Of Causes, has demonstrated that the author was a monotheistic creationist who transformed the Procline referring to the philosopher Proclus doctrine of emanation into a true doctrine of divine creation and providence. In the same study, he noted the similarity between the two moments in the emanation of plurality from the One as taught by Plotinus in the Enneads, and the creation of all things by the One-True-God as taught in the Liber, thus providing additional evidence for the contention that the author had access to the Enneads in one form or another.