In the third and last period of Greek Philosophy, we can pass by the Stoic and Epicurean, and also the Sceptical schools. For, great as was their practical importance and influence, these schools never aimed at embracing the totality of life; no one of them ever, as a matter of fact, cultivated more than one side of a purely individual self-education and peace-seeking. They reproduced and continued, on a larger scale, those interesting three minor Socratic schools which themselves had, even during the full times and universal systems of Plato and Aristotle, constituted as it were the backwaters away from the main stream of Greek speculation. The Stoic system carries on the Cynic school; the Epicurean, the Cyrenaic; and the Sceptical, the Megaric. Unity and Rest is monopolized by the Stoic, and Multiplicity and Movement by the Epicurean; whilst the Sceptic attempts to stand apart from and above both. What Socrates, Plato, and Aristotle, living in still many-sided and public-spirited times, had, in their lives and teaching, seen and practised together; now, in a period of spiritual poverty and self-seeking, is seen and practised by separate schools separately, each in external conflict with the other. Only the system of that great mystical soul, Plotinus, has, for our present purposes, a claim on our close attention. Indeed this, the last great attempt at synthesis of the ancient Greek mind, will have to occupy us in such detail throughout a great part of this book, that here we can but briefly indicate its chief characteristics as regards the One and the Many. It is then clear that Plotinus is an even more intensely and exclusively religious spirit than is Plato himself. Some of his descriptions of the soul’s flight from the world of sense and of the soul’s substantial touch of God in ecstasy, and again his penetrating apprehension of the timeless and spaceless characteristics of Spirit, have never ceased, at least indirectly, to leaven, and to lend much of their form to, the deepest recollective aspirations of religious souls in Europe and Western Asia, for some fourteen centuries at least.