But how can the meaning of life be that which makes life no longer worth living?

"If success is about achieving something in the future, where does that leave us once we have succeeded, if we do? Once we get what we want, what point is there left to life? Paradoxically, it would seem that if success is the goal of life, then once we get it we no longer have a reason to live. But how can the meaning of life be that which makes life no longer worth living?"