I have also observed, that when of two objects connected to-ether by any of these relations, one is immediately present to the memory or senses, not only the mind is conveyed to its co-relative by means of the associating principle; but likewise conceives it with an additional force and vigour, by the united operation of that principle, and of the present impression.

All this I have observed, in order to confirm by analogy, my explication of our judgments concerning cause and effect.

But this very argument may, perhaps, be turned against me, and instead of a confirmation of my hypothesis, may become an objection to it.

For it may be said, that if all the parts of that hypothesis be true, viz.

that these three species of relation are derived from the same principles; that their effects in informing and enlivening our ideas are the same; and that belief is nothing but a more forcible and vivid conception of an idea; it should follow, that that action of the mind may not only be derived from the relation of cause and effect, but also from those of contiguity and resemblance.