I'm not explaining it very well, so there's that. Here's another attempt at a thought experiment: If you were perfectly content/happy sitting in your chair, would you act? That is, if there was nothing that could increase your happiness, would you do something other than sitting in your chair? Then, what would make you get up? What happens that impels you to get up? IOW, what is the incentive to act? What propels action? Why do you act rather than sit in your chair? What changed? Why are you no longer perfectly content?