burning like matchsticks in the face of the darkness

The Kate Hamill version doesn't give the impression that she's taking care of her father (just that she tolerates him), but that makes a lot of sense that Clueless draws on that -- Cher trying to get her dad to drink orange juice (and a general vibe of her wanting him to eat healthy/take care of himself), him constantly yelling at everyone (he's a highly-paid litigator, and seems constantly cranky/stressed)...