Too much of a good thing is not a good thing. A good thing...is a good thing. Greed is a bad thing. Too much money is a wall - too much money takes too much space and the important things cannot fit in anymore... Well, for one, I'm a Superman fan. Yet, Superman as truly shown in movie & comic books does not exist. He does exist as an idea and a person can try to live up to his morals. So, what you say is a "half-truth" (if there's such a thing). You go back to your post and count...I'm not gonna do it - it would imply work...
Hmm , that theory is sort of like a version of Taoism. Extreme good ( Yin) eventually turns into Yang ("bad")or "negative". But I dont think thats a good way to describe it. More like , all forces exist because that is the way the universe is. And the only thing that can ultimately last is a "balance" in what *appears* to be chaos. Anyways ... big topic. On the other bit , I dont think "obsession" or "passion" is bad. Sometimes its the minds way of forcing u from the forces of inertia around you - into what you should really be doing. But I think we need to understand the causes of our obsessions - rather than be a slave to them. BTW I've just come up with a theory of how dream worlds and "waking" worlds might all be existing together... ( and I'm not even on acid today...LOL)