But that we really have no such idea, is certain.

For whence should it be derived?
Does it arise from an impression of sensation or of reflection?
Point it out distinctly to us, that we may know its nature and qualities.

But if you cannot point out any such impression, you may be certain you are mistaken, when you imagine you have any such idea.
But though it be impossible to shew the impression, from which the idea of time without a changeable existence is derived; yet we can easily point out those appearances, which make us fancy we have that idea.

For we may observe, that there is a continual succession of perceptions in our mind; so that the idea of time being for ever present with us; when we consider a stedfast object at five-a-clock, and regard the same at six; we are apt to apply to it that idea in the same manner as if every moment were distinguished by a different position, or an alteration of the object.

The first and second appearances of the object, being compared with the succession of our perceptions, seem equally removed as if the object had really changed.