" We can’t rest on our past successes. We can’t be satisfied with what we did back then. We always, always have to be pushing forward to what is in front of us. And in doing that, we make ourselves an appreciating asset instead of a depreciating one, living off of our past successes.
Success can be its own obstacle if we’re not careful. Too many of us hold on to our past wins at the expense of future wins. If you’re dwelling in the past—even the really good stuff about your past—there is no way you’ll ever make any progress in your life. It’s like eating half an apple and thinking you’ll save the rest for later. The more time that goes by, the less appealing the apple looks. Stale success is like a browned apple.
What served us today won’t necessarily serve us tomorrow. What was nourishing yesterday becomes poisonous if we’re always stashing it away, saving it for later. "

― Scott Hamilton , Finish First: Winning Changes Everything