Given that moments are so fleeting, the person you see in the mirror is the person you WERE, not who you ARE. In fact, who you are right now never even has a chance to appear in the mirror.
Thinking this way can help you understand that every moment produces a new you. And it’s what you DO right now that can make the only difference.
You can also recognize that the circumstances in which you find yourself now are due to who you WERE, not who you are now. That can be incredibly freeing.
You’re always new at every moment. The new you always has the choice to do things as they’ve always been done, or to try something new.