Here's a story about a wrestling coach inspiring me.
I was a football player who wrestled during wrestling season. That was my mentality. The head wrestling coach was an assistant football coach who was biding his time until he got the head football job. (He did go on to become the head FB coach, win multiple state championships, and get inducted in to the state FB coaches HOF).
I was a sophomore wrestling 160 and my practice partner was a junior wrestling 171. He was bigger, older, stronger, and better than me. I would lose to him every day. It made sense to me for the reasons just stated.
One day the head coach wasn't at practice and the assistant coach was in charge. We were doing situational wrestling, going live from different positions. Whoever won the position got to watch the other guy do 20 pushups. The assistant came over to watch me and my partner. I kept losing every position. I was waiting for the whole thing to end soon, getting tired of the pushups. He just kept going position after position with no end in sight. I got pissed and actually starting winning positions. It never occurred to me before that I could beat this guy, it just wasn't on my radar. The assistant coach showed me that he knew I could, and then let me prove it to myself. I became a wrestler, not just a football player on the wrestling team.
I saw him many years later and told him about this moment and what an impact it had on me. He had no recollection of it.