Page:Treatise of Human Nature (1888).djvu/297



As all the perceptions of the mind may be divided into impressions and ideas, so the impressions admit of another division into original and secondary. This division of the impressions is the same with that which I formerly made use of when I distinguish'd them into impressions of sensation and reflection. Original impressions or impressions of sensation are such as without any antecedent perception arise in the soul, from the constitution of the body, from the animal spirits, or from the application of objects to the external organs. Secondary, or reflective impressions are such as proceed from some of these original ones, either immediately or by the interposition of its idea. Of the first kind are all the impressions of the senses, and all bodily pains and pleasures: Of the second are the passions, and other emotions resembling them.

’Tis certain, that the mind, in its perceptions, must begin somewhere; and that since the impressions precede their correspondent ideas, there must be some impressions, which without any introduction make their appearance in the soul. As these depend upon natural and physical causes, the examination of them wou'd lead me too far from my present