Among the early Greeks the rôle of the philosopher was one of superlative dignity. In point of knowledge he was less easily satisfied than other men. He thought beyond immediate practical problems, devoting himself to a profounder reflection, that could not but induce in him a sense of superior intellectual worth. The familiar was not binding upon him, for his thought was emancipated from routine and superficiality. Furthermore his intellectual courage and resolution did not permit him to indulge in triviality, doubt, or paradox. He sought his own with a faith that could not be denied. Even Heraclitus the Dark, who was also called "the Weeping Philosopher," because he found at the very heart of nature that transiency which the philosophical mind seeks to escape, felt himself to be exalted as well as isolated by that insight. But this sentiment of personal aloofness led at once to a division of experience. He who knows truly belongs to another and more abiding world. As there is a philosophical way of thought, there is a philosophical way of life, and a philosophical object. Since the philosopher and the common man do not see alike, the terms of their experience are incommensurable. In Parmenides the Eleatic this motive is most strikingly exhibited. There is a Way of Truth which diverges from the Way of Opinion. The philosopher walks the former way alone. And there is an object of truth, accessible only to one who takes this way of truth. Parmenides finds this object to be the content of pure affirmation.
"One path only is left for us to speak of, namely, that It is. In it are very many tokens that what is, is uncreated and indestructible, alone, complete, immovable, and without end. Nor was it ever, nor will it be; for now it is, all at once, a continuous one."[308:2]
The philosophy of Parmenides, commonly called the Eleatic Philosophy, is notable for this emergence of the pure concept of absolute being as the final object of knowledge. The philosopher aims to discover that which is, and so turns away from that which is not or that which ceases to be. The negative and transient aspects of experience only hinder him in his search for the eternal. It was the great Eleatic insight to realize that the outcome of thought is thus predetermined; that the answer to philosophy is contained in the question of philosophy. The philosopher, in that he resolutely avoids all partiality, relativity, and superficiality, must affirm a complete, universal, and ultimate being as the very object of that perfect knowledge which he means to possess. This object is known in the history of these philosophies as the infinite or absolute.[309:3]
The Eleatic Conception of Being.
§ [149]. The Eleatic reasons somewhat as follows. The philosopher seeks to know what is. The object of his knowledge will then contain as its primary and essential predicate, that of being. It is a step further to define being in terms of this essential predicate.
Parmenides thinks of being as a power or strength, a positive self-maintenance to which all affirmations refer. The remainder of the Eleatic philosophy is the analysis of this concept and the proof of its implications. Being must persist through all change, and span all chasms. Before being there can be only nothing, which is the same as to say that so far as being is concerned there is no before. Similarly there can be no after or beyond. There can be no motion, change, or division of being, because being will be in all parts of every division, and in all stages of every process. Hence being is "uncreated and indestructible, alone, complete, immovable, and without end."
The argument turns upon the application to being as a whole of the meaning and the implications of only being. Being is the affirmative or positive. From that alone, one can derive only such properties as eternity or unity. For generation and decay and plurality may belong to that which is also affirmative and positive, but not to that which is affirmative and positive only. The Eleatic philosophy is due, then, to the determination to derive the whole of reality from the bare necessity of being, to cut down reality to what flows entirely from the assertion of its only known necessary aspect, that of being. We meet here in its simplest form a persistent rationalistic motive, the attempt to derive the universe from the isolation and analysis of its most universal character. As in the case of every well-defined philosophy, this motive is always attended by a "besetting" problem. Here it is the accounting for what, empirically at least, is alien to that universal character. And this difficulty is emphasized rather than resolved by Parmenides in his designation of a limbo of opinion, "in which is no true belief at all," to which the manifold of common experience with all its irrelevancies can be relegated.
Spinoza's Conception of Substance.
§ [150]. The Eleatic philosophy, enriched and supplemented, appears many centuries later in the rigorous rationalism of Spinoza.[311:4] With Spinoza philosophy is a demonstration of necessities after the manner of geometry. Reality is to be set forth in theorems derived from fundamental axioms and definitions. As in the case of Parmenides, these necessities are the implications of the very problem of being. The philosopher's problem is made to solve itself. But for Spinoza that problem is more definite and more pregnant. The problematic being must not only be, but must be sufficient to itself. What the philosopher seeks to know is primarily an intrinsic entity. Its nature must be independent of other natures, and my knowledge of it independent of my knowledge of anything else. Reality is something which need not be sought further. So construed, being is in Spinoza's philosophy termed substance. It will be seen that to define substance is to affirm the existence of it, for substance is so defined as to embody the very qualification for existence. Whatever exists exists under the form of substance, as that "which is in itself, and is conceived through itself: in other words, that of which a conception can be formed independently of any other conception."[312:5]
Spinoza's Proof of God, the Infinite Substance. The Modes and the Attributes.