Attainment of goals gives brief pleasure and satisfaction but I think that the pursuit give more long lasting pleasure. Once it's attained, we may or may not have anything to strive for. Searching for something we desire gives us a sense of being and a sense of purpose. We attain them we start looking for that next big thing to accomplish. If we were actually happy with the attainment of the goal we would be able to stop right there. The brief moment of self accomplishment deriving from the achievement of our goal is just that: brief. We as humans are always looking for ways to improve our lives and finding the shortest route to happiness. And it is in our lives that we avoid pain by the pursuit of what we desire.
While you are pursuing a goal, you are imagining the pleasure of attainment. Once you achieve the goal, the pleasure may not be as great as you imagined.
Once it's attained, we may or may not have anything to strive for. Searching for something we desire gives us a sense of being and a sense of purpose. We attain them we start looking for that next big thing to accomplish. If we were actually happy with the attainment of the goal we would be able to stop right there. The brief moment of self accomplishment deriving from the achievement of our goal is just that: brief. We as humans are always looking for ways to improve our lives and finding the shortest route to happiness. And it is in our lives that we avoid pain by the pursuit of what we desire.
It depends on the goal. Some goals once attained are just the beginning. There is such a thing as a prerequisite. Until that is attained everything else is just a pipe dream. Then there are others in which the pursuit is the true goal. For example, climbing a mountain. Once you've been to the top of a mountain, all other mountain tops are the same. The object is not the summit but the climb and the return. These are the challenge.