First of all sorry for this non-research post.

I was watching *Jeffrey Blitz* Lucky documentary movie and it was interesting to me that a winner of Lottery was a math Ph.D. from Berkeley.

In the movie he said:

Robert:... when I was in Berkeley, I had good fortune to take a course in differential geometry from professor S. S. Chern because loving the class but more to the point I was getting inspired about differential geometry becausethe way Chern taught.

There are lots of articles on the web about Chern's research, works, life and I remember someone called him a legendary mathematician.

But I want to know what is so special about Chern's way of teaching? Or the above compliment is because of the intrinsic enjoyment of differential geometry that he is relating to Chern? I am curious to know some examples of Chern's teaching that you are aware of.