I think one’s theory of reality is shaped more by subconscious/latent consumption of the same ideas repeated over time, as opposed to any individual thing (eg book, relationship, event) having an outsized impact

Not to say latter category has no effect but just at scale former tends to overpower

It’s all about the stories you tell yourself

The more you repeat a story, the more ingrained it becomes

The more ingrained it becomes, the more that story becomes a belief

The latter category may steer the direction of your stories, but it’s definitely the frequency and magnitude of the stories that drive beliefs