Regarding “the reason of the thing”, Locke claims that “we constantly desire happiness” (E2–5 II.xxi.39: 257), where happiness is “the utmost Pleasure we are capable of” (E2–5 II.xxi.42: 258). Moreover, he says, any amount of uneasiness is inconsistent with happiness, “a little pain serving to marr all the pleasure” we experience. Locke concludes from this that we are always motivated to get rid of pain before securing any particular pleasure (E2–5 II.xxi.36: 254). Locke also argues that absent goods cannot move the will, because they don’t exist yet; by contrast, on his theory, the will is determined by something that already exists in the mind, namely uneasiness (E2–5 II.xxi.37: 254–255). Finally, Locke argues that if the will were determined by the perceived greater good, every agent would be consistently focused on the attainment of “the infinite eternal Joys of Heaven”. But, as is evidently the case, many agents are far more concerned about other matters than they are about getting into heaven. And this entails that the will must be determined by something other than the perceived greater good, namely, uneasiness (E2–5 II.xxi.38: 255–256). (For interesting criticisms of these arguments, see Stuart 2013: 453–456.)