I think a high IQ leads you to know what to quit when and when to persist. In my experience, smart people quit bad things sooner, and persist through good thing

I think a high IQ leads you to know what to quit when and when to persist. In my experience, smart people quit bad things sooner, and persist through good things longer. Stupid people quit the job of a lifetime or break up with a great person when they should have endured, and/or stick with the same horrible job/person through everything even though giving up would have improved their life. Or so the thinking goes.