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Being; Causality; Negativity; Neoplatonism.
This dissertation presents the reception of Neoplatonism in the thought of St. Thomas Aquinas, more specifically his Commentary on the Liber of Causis. As it is a synthesis of the Elements of Theology of Proclus, as St. Thomas will identify, the Liber de Causis preserves the same triadic, hierarchical and dynamic order that is the cause of all existence: Divine, Intelligible and Psychic. St. Thomas uses the Neoplatonic doctrine both to distinguish these causes and to investigate how they relate to each other, from the material being to the subsistent being itself, considering the ideas of participation of all beings in the First Being by a certain metaphysical causality and the concept of negativity of human knowledge versus the absolute transcendentality of the first cause.