Here we most not be contented with saying, that the vividness of the idea produces the belief: We must maintain that they are individually the same.

The frequent repetition of any idea infixes it in the imagination; but coued never possibly of itself produce belief, if that act of the mind was, by the original constitution of our natures, annexed only to a reasoning and comparison of ideas.

Custom may lead us into some false comparison of ideas.

This is the utmost effect we can conceive of it.

But it is certain it coued never supply the place of that comparison, nor produce any act of the mind, which naturally belonged to that principle.
A person, that has lost a leg or an arm by amputation, endeavours for a long time afterwards to serve himself with them.