Locke’s view, then, seems to be that our volitions are caused (though not, perhaps, deterministically, i.e., in a way that is fixed by initial conditions and the laws of nature) by uneasinesses.  How is this supposed to work? As Locke sees it, either “all pain causes desire equal to it self” (E2–5 II.xxi.31: 251) or desire is simply identified with “uneasiness in the want [i.e., lack] of an absent good” (E2–5 II.xxi.31: 251). So the desire that either is or is caused by uneasiness is a desire for the removal of that uneasiness, and this is what proximately spurs us to take means to secure that removal.