A lot of time people will reach their goal and then lose motivation. How many times have you wanted to lose 5 lbs, and but once you lose it, you go right back to your old eating and drinking habits? Do you know someone who trains for an event and once the finish, they quit training? The goal is their end point when it should be a stepping stone.
I've been thinking a lot over the last couple of years about goals and expectations. If you have expectations that or too high or a goal that is too lofty, then you are disappointed with yourself. If your expectations aren't high enough, you may possibly not achieve your full potential and could be cheating yourself. Where are the lines between mediocrity, good, and exceptional?