In my belief, then, of the existence of an object, there is included the belief, that, in such and such circumstances, I should have such and such sensations. Is there any thing more? It will be answered immediately, yes: for that, along with belief in my sensations as the _effect_, there is belief of something as the _cause_; and that to the _cause_, not to the _effect_, the name object is appropriated. This is a case of Belief, which deserves the greatest possible attention. It is acknowledged, on all hands, that we know nothing of objects; but the sensations {350} we have from them. There is a cause, however, of those sensations, and to that we give the name object: or, rather, there is a cluster of causes, corresponding with the cluster of sensations. Thus, when I see, and handle, and smell, and taste the rose, there is a cause of the sensation red, a cause of the sensation soft, a cause of the sensation round, a cause of the smell, and a cause of the taste; and all these causes are united in the rose. But what is the rose, beside the colour, the form, and so on? Not knowing what it is, but supposing it to be something, we invent a name to stand for it. We call it a _substratum_. This substratum, when closely examined, is not distinguishable from Cause. It is the cause of the qualities; that is, the cause of the causes of our sensations. The association, then, is this. To each of the sensations we have from a particular object, we annex in our imagination, a cause; and to these several causes we annex a cause, common to all, and mark it with the name substratum. This curious case of association we now proceed to develop. The word cause, means the antecedent of a consequent, where the connection is constant. This has been established on such perfect evidence, that it is a received principle of philosophy. More of the evidence of this important principle will appear as we go on. Here we shall take the proposition for granted.