âThe regular mystical way of attaining the vision of the One is by ascetic training, fundamentally the same in all religious systems. But this ineffable kind of Oneness is not strictly philosophical, for philosophy is essentially talkative and explicit, so I must pass it by.
   The usual philosophic way of reaching deeper oneness has been by the conception of substance. First used by the Greeks, this notion was elaborated with great care during the Middle Ages. Defined as any being that exists per se, so that it needs no further subject in which to inhere (Ens ita per se existens, ut non indigeat alio tamquam subjecto, cui inhaereat, ad existendum) a âsubstanceâ was first distinguished from all âaccidentsâ (which do require such a subject of inhesionâcujus esse inesse). It was then identified with the âprinciple of individualityâ in things, and with their âessenceâ, and divided into various types, for example into first and second, simple and compound, complete and incomplete, specific and individual, material and spiritual substances. God, on this view, is a substance, for he exists per se, as well as a se; but of secondary beings, he is the creator, not the substance, for once created, they also exist per se though not a se. Thus, for scholasticism, the notion of substance is only a partial unifier, and in its totality, the universe forms a pluralism from the substance-point-of-view.
   Spinoza broke away from the scholastic doctrine. He began his âEthicsâ by demonstrating that only one substance is possible, and that that substance can only be the infinite and necessary God. This heresy brought reprobation on Spinoza, but it has been favored by philosophers and poets ever since. The pantheistic spinozistic unity was too sublime a prospect not to captivate the mind. It was not till Locke, Berkeley, and Hume began to put in their âcriticalâ work that the suspicion began to gain currency that the notion of substance might be only a word masquerading in the shape of an idea.
   Locke believed in substances, yet confessed that âwe have no such clear idea at all, but only an uncertain supposition of we know not what, which we take to be the substratum, or support of those ideas we do not know.â He criticized the notion of personal substance as the principles of self-sameness in our different minds. Experientially, our personal identity consists, he said, in nothing more than the functional and perceptible fact that our later states of mind continue and remember our earlier ones.
   Berkeley applied the same sort of criticism to the notion of bodily substance. âWhen I consider,â he says, âthe two parts (âbeingâ in general, and âsupporting accidentsâ) which make the signification of the words âmaterial substance,â I am convinced there is no distinct meaning annexed to them. ... Suppose an intelligence without the help of external bodies to be affected with the same train of sensations that you are, imprinted in the same order, and with like vividness in his mind. I ask whether that intelligence hath not all the reason to believe the existence of corporeal substances, represented by his ideas, and exciting them in his mind, that you can possibly have for believing the same thing.â Certain grouped sensations, in short, are all that corporeal substances are known-as, therefore the only meaning which the word âmatterâ can claim is that it denotes such sensations and their groupings. They are the only verifiable aspect of the word.â
â William James, The One and the Many












