Memories are thoughts that arise. They're not realities. Only when you believe that they are real, then they have the power over you. But when you realize it's just another thought arising about the past, then you can have a spacious relationship with that thought. The thought no longer has you in its grip.
So many people have this idea: I want to achieve something great or be somebody great. And they neglect the step that leads to greatness. They don't honor this step at this moment because they have this idea of some future moment where they are going to be great.