I think causal links are hard to come by in any science, but here the important tidbit is that particular emotions (perseverance towards ones goals) were correl

I think causal links are hard to come by in any science, but here the important tidbit is that particular emotions (perseverance towards ones goals) were correlated with less incidence or severity of disorders, compared to others (a feeling of control of ones environment/future). The value here is that showing the existence of an emotion earlier in ones life is correlated to lessening of symptoms later is that it helps therapists know which emotions and behaviors to target during long term treatment like cognitive/behavioral therapy. At least that's how I read it, I'm not a professional