The first possibility is that there is a cause both for the things that become, and those that are; the cause of the former being their becoming, and that of the latter, their existence. Again, neither of them may have a cause. Or, in both cases, some may have a cause, and some not. Further, those that become might have a cause, while, of these that exist, some might partly have a cause. Contrariwise, all things that exist may have a cause, while of those that become, parts may have a cause, and part not. Last, none of the things that become might have any cause. EXCEPT THE FIRST, ALL THINGS ARE CAUSED. Speaking of eternal things, the first cannot be derived from other causes, just because they are first. Things dependent from the first, however, may indeed thence derive their being. To each thing we should also attribute the resultant action; for a thing's being is constituted by its displayed energy.
Plotinus was a major Greek-speaking philosopher of the ancient world. In his philosophy there are three principles: the One, the Intellect, and the Soul. His teacher was Ammonius Saccas and he is of the Platonic tradition. Historians of the 19th century invented the term Neoplatonism and applied it to him and his philosophy which was influential in Late Antiquity. Much of the biographical information about Plotinus comes from Porphyry's preface to his edition of Plotinus' Enneads. His metaphysical writings have inspired centuries of Pagan, Islamic, Jewish, Christian, and Gnostic metaphysicians and mystics.