In this video clip, I love the way Feynman explains how fire works. He takes such obvious delight in teaching others. You can see how happy he is as his face lights up. And he makes it so clear that anyone can understand it. Students know when you like your subject or not.
If you are passionate about your subject, you encourage the students to love it too. If you hate your subject, why should your students like it?
Feynman has a lot in common with all the amazing teachers out there. You walk into their classroom and immediately feel their positive atmosphere in their classroom, the way they interact with and engage their students and their passion for whatever subject they are teaching. These teachers are not famous, but they deserve just as much awe and respect as someone like Feynman.