Well my point with that response was more of: by who's metric are you measuring your warranting being here? If it isn't history's, then I think it should be you

Well my point with that response was more of: by who's metric are you measuring your warranting being here? If it isn't history's, then I think it should be your own. And if its your own, I really believe as long as you put in a good effort - not even necessarily your best effort all the time - then that should be good enough. A higher sense of purpose is excellent but you also have to understand that life is really weird and almost never works out how you expect it to. But I'm guessing you already know all of that. At this point its probably more about moving your own metric and zeroing in on what you want to do.