Ok.
I'm going to share one.
I've always been interested in strength sports; field events (shot put, discus), weightlifting, powerlifting, strongman. But I'm a pretty average guy.
As these things happen, my son is a genetic freak. As a teen he became a nationally ranked strength athlete. I was his coach. We have some good memories of that.
He was talking to one of his teachers about his training. Teacher said, "I could do those things in my younger days, but I'm too old now."
Son said, "Yeah.... That's an excuse. Dad's ten years older than you and he works out with me. I see him banging out set after set of heavy barbell squats, sweating and chuffing like a freakin train, doing tire slams and farmer walks. You just made a choice to quit and he chose to keep going."
He's way, way stronger than me, but I felt like I set an example for him.