The apprehensions attributed only to the soul are those whereof the effects are felt as in the soul itself, and whereof any near cause, whereunto it may be attributed is commonly unknown. Such are the resentments of joy, wrath and the like, which are sometimes excited in us by the objects which move our nerves, and sometimes too by other causes. Now, although all our apprehensions, as well those attributed to objects without us, as those relating to divers affections of our body, be, in truth, passions in respect of our soul, when this word is taken in the more general signification, yet it is usual to restrain it to signify only those attributed to the soul itself. And they are only these latter which I here undertake to explain under the notion of passions of the soul.