I use self-interest, for example I don't want to get out of bed, it's not my interest (self-interest in action).

phone: why don’t you go to sleep tommy it’s 2 in the morning?
tommy:why don’t you die you dumbazz

He knew it was in his self-interest to help as many people as possible thrive and prosper, in comfort and safety, that only then could he ultimately thrive and prosper.