I was waiting for my daughter at a crowded baggage claim area. Right before I could reach my hand to her, I heard a shout-out “I know that face”, and she turned to the source of that voice, a lady rushed to her and gave a warmest hug several times. She murmured that “you are and you remain as one of my most cherished students”
It turned that the lady was her high school teacher and sponsor for Student Council and they have not seen each other for 4 years. People around them were genuinely happy to see such a sweet encounter.
That is what I call impact.