Goals never fully materialise because once we reach them the purpose behind them begins to dissipate.
So we set new goals, and the process repeats.
It's the story of Sisyphus - forever pushing a boulder up a mountain.
A solution to this paradox is to give the obstacle or task purpose in of itself. To find intrinsic meaning in the act of pursuing our goals and not simply as a path to some destination.
Or as the saying goes, 'what stands in the way becomes the way'