No one can deny the huge role language plays in our lives, but at the very same time, a lot of us take it’s basis for granted. We never even consider breaking it down, the different kinds of words, where they come from, why we use them, what they really mean. It’s a whole system we learn as children, take for face value and move on. And ye, language, not just the ability to make noise, is what separates us from animals, it is the most important element we possess as a race. In chapters I though IV of book III, Locke breaks down language to its most simple of forms and builds upon this foundation. Ultimately as he states in chapter II, words mean nothing but the ideas to which we assign them, they are the tools that man use in order to get the invisible ideas floating around out of his head and into the world. It is not the words that have meaning; they mean nothing without the ideas. But his major focus lays in general ideas, because this isn’t as simple as particulars, assigning a certain word to a certain thing, this is giving a whole array of similar things a common identity.
And then there is the particularly interesting part in which he analyzes the difference between real and nominal essences of beings. The idea of “essence” has been a reoccurring theme in the works of Descartes, Spinoza, and now Locke. It was important when trying to prove the existence of God, but Locke brings it down to the world around us. According to him there is both real and nominal essences, Real, being the intrinsic value, and nominal pertaining to its observable properties. And yet, despite what we would assume differentiation to be based off of (the real essence), it is based off nominal essence. He goes on to state “species that are distinguished by their real ideas [are] useless” (Locke, 186). This may seem backwards, but after reading through point seventeen we come to realize that the basis of words is solely what we perceive, this is what he had laid out in his previous chapters. Words, general terms, they rely on the characteristics things posses, and then also privation. Cold is the absence of heat; man is what the particular “Joe” lacks. This is a turn from Descartes who could and would not rely on his senses as a connection to reality.