[tgb]

Have you read the Feynman lectures? They're not exactly trivial. They have some diversions towards casual descriptions, but they're quite grounded in mathematics. I haven't watched his course lectures, but I have a hard time believing that they're that different.

He does write explicitly non-math based works as well, like the (IMO excellent) QED book. But I also have his lectures on computation book here, and I had to leave a good number of problems in it unsolved.

[throwaway7645]

Yea, you can watch on YouTube. They aren't very math based. Of course the theory is mathematical, but you won't get that without equations. I'm just talking about his intro course and have never read QED or his lectures on computation. A great scientist making more accomplishments in an afternoon than I will make in my lifetime :).