The best way to learn something is to teach it to someone that has no idea what you’re talking about.
When I was 22 years old I was hired as a Digital Design Teacher in a high school in Rome, my home town. It was really weird being 22 and teaching to 18 years old kids. I was a kid myself.
I love teaching and they say I’m pretty good at it. I get excited when someone asks me “but why?” when explaining something. Being able to spark curiosity and share my knowledge with other people is the best way to keep my mind sharp and constantly learn new techniques.