Spinoza strikes a rather Platonic note in suggesting that insofar as we live by perception and imagination we are reactive, confused, and unfree, but insofar as we have genuine ideas or concepts, we are active and free. This last part depends on his rather unusual take on what ideas are.
“I say expressly that the Mind has, not an adequate, but only a confused… knowledge, of itself, of its own Body, and of external bodies, so long as it perceives things from the common order of nature, i.e., so long as it is determined externally, from fortuitous encounters with things, to regard this or that, and not so long as it is determined internally, from the fact that it regards a number of things at once, to understand their agreements, differences, and oppositions. For so often as it is disposed internally, in this or another way, then it regards things clearly and distinctly, as I shall show below” (Spinoza, Ethics, book II, proposition 29, scholium, Collected Works vol. 1, Curley trans., p. 471, brackets in original).
The actual nature of “Mind” for Spinoza has yet to be made clear. So far it seems straightforwardly individual; there is nothing here like the Aristotelian and Hegelian notion of Reason as a socially and linguistically grounded ethos. On the other hand, we soon will turn out to be very far indeed from a standard modern or early modern notion of mind. I am almost reminded of the non-private interiority that connects us to God in Augustine. But either way, the practical result is that we get to an antidote for confusion, thanks to participation in a Reason that is takes us beyond what is merely subjective or self-seeking.
Again like Plato, he emphasizes that ideas are different both from images and from words, implicitly taking both of the latter as examples of mere representation. To regard a number of things at once and understand their agreements, differences, and oppositions is to ground one’s perspective in relations of Reason rather than in mere representations of singular things.
“I begin, therefore, by warning my Readers, first, to distinguish accurately between an idea, or concept, of the Mind, and the images of things that we imagine. And then it is necessary to distinguish between ideas and the words by which we signify things. For because many people either confuse these three — ideas, images, and words — or do not distinguish them accurately enough, or carefully enough, they have been completely ignorant of this doctrine concerning the will. But it is quite necessary to know it, both for the sake of speculation and in order to arrange one’s life wisely.”
“Indeed, those who think that ideas consist in images which are formed in us from encounters with… bodies, are convinced that those ideas of things… of which we can form no similar image… are not ideas, but only fictions which we feign from a free choice of the will. They look on ideas, therefore, as mute pictures on a panel, and preoccupied with this prejudice, do not see that an idea, insofar as it is an idea, involves an affirmation or negation.”
“And then, those who confuse words with the idea, or with the very affirmation that the idea involves, think that they can will something contrary to what they are aware of, when they only affirm or deny with words something contrary to what they are aware of. But these prejudices can be easily put aside by anyone who attends to the nature of thought, which does not at all involve the concept of extension. He will then understand clearly that an idea (since it is a mode of thinking) consists neither in the image of anything, nor in words. For the essence of words and of images is constituted only by corporeal motions, which do not at all involve the concept of thought” (book II, proposition 49, scholium 2, pp. 485-486).
To stress the separateness of thought from extension is yet again to direct us away from mere representation of things, and from taking the represented things for granted.
When he says that an idea involves an affirmation or negation, he means that unlike an isolated word, an idea in his particular sense is something we can assert or deny (it has propositional content). If it’s actually not a representation, an idea must be an inferential meaning, and that would be something we can affirm or deny.
He had just argued that “In the Mind there is no volition, or affirmation and negation, except that which the idea involves insofar as it is an idea” (proposition 49, p. 485). He goes on to strictly identify “the Mind” with its “ideas”, i.e., with what it affirms, and contrariwise with what it rejects. This is what I meant earlier in suggesting that what he means by “Mind” turns out to be quite different from standard modern notions.
In effect he identifies “us” not with our consciousness as Locke does, but rather by what we affirm and what we reject. On this point at least, he comes out close to both Aristotle and Hegel.
I do think Aristotle and Hegel are a little more explicit than Spinoza that what is most authoritative with respect to what we really affirm or deny is what we actually do, as witnessable by others.