Locke provides evidence from observation and from “the reason of the thing” for the claim that it is uneasiness, rather than perceived good, that determines the will. Empirically, Locke notes that agents generally do not seek a change of state unless they experience some sort of pain that leads them to will its extinction. A poor, indolent man who is content with his lot, even one who recognizes that he would be happier if he worked his way to greater wealth, is not ipso facto motivated to work.  A drunkard who recognizes that his health will suffer and wealth will dissipate if he continues to drink does not, merely as a result of this recognition, stop drinking: but if he finds himself thirsty for drink and uneasy at the thought of missing his drinking companions, then he will go to the tavern. That is, Locke recognizes the possibility of akratic action, i.e., pursuing the worse in full knowledge that it is worse (E II.xxi.35: 253–254).  (For more on Locke on akrasia, see Vailati 1990, Glauser 2014, and Moauro and Rickless 2019.)