The Enneads [Penguin Classics)

Plotinus is the last great philosopher of antiquity, although in more than one respect he is a precursor of modern times. The Enneads bring together Platonism, mystic passion and ideas from Greek philosophy, together with striking variants of the Trinity and other central Christian doctrines, to produce a highly original synthesis. Yet despite the profundity of his thought, and his immense influence on mystics and religious writers, Plotinus remained largely inaccessible.