The four lectures on which the QED book is based.
I’ve always loved Feynman’s ways of explainging things. What an incredible teacher:
And then there’s the … kind of thing which you don’t understand. Meaning “I don’t believe it, it’s crazy, it’s the kind of thing I won’t accept.” Eh. The other part well… this kind, I hope you’ll come along with me and you’ll have to accept it because it’s the way nature works. If you want to know the way nature works, we looked at it, carefully, […unsure of this bit…] that’s the way it works. You don’t like it…, go somewhere else! To another universe! Where the rules are simpler, philosophically more pleasing, more psychologically easy. I can’t help it! OK! If I’m going to tell you honestly what the world looks like to the… human beings who have struggled as hard as they can to understand it, I can only tell you what it looks like. And I cannot make it any simpler, I’m not going to do this, I’m not going to simplify it, and I’m not going to fake it. I’m not going to tell you it’s something like a ball bearing inside a spring, it isn’t. So I’m going to tell you what it really is like, and if you don’t like it, that’s too bad.”