The document discusses a hypothetical scenario where it is impossible to lose weight and bodies stay the same forever. It suggests that in this scenario, society would not make assumptions about people's health or worth based on their weight, as weight would not reflect personal failings or striving for perfection but simply genetic luck. Most importantly, the document conveys that people can be healthy, happy and free without changing their physical body, by stopping self-criticism and defining oneself through others' perceptions.