John Norbert Deck was a Canadian philosopher who inspired generations of students with his highly idiosyncratic form of idealism, deriving from Plotinus but equally rooted in Thomas Aquinas and Hegel. Nature, Contemplation, and the A Study in the Philosophy of Plotinus was his doctoral it reappraises the Neoplatonic philosophy of Plotinus from the standpoint of a central doctrine in his Enneads, exploring how "contemplative producing" gives rise to every level of reality, including the physical world. R. Baine Harris, Director of the International Neoplatonic Society, has called Nature, Contemplation and the One "the best book on Plotinus" and said that "it must be read by all modern serious students of Plotinus."