I first learned about Feynman from his Feynman Lectures on Physics. This was, and maybe still is, scripture for undergrads curious about Physics. What undergrad is not?
Nobel prize and all that, but what Feynman could do best was to communicate, and he could communicate in humorous, self-deprecating, and humble ways. I believe that he truly believed that he wasn't too smart, just curious and persistent.
Here's Feynman's speech titled What Is Science? delivered to the National Science Teachers Association, 1966, in New York City. He talks a lot about how his father inspired his curiosity. Read it. One quote:
I listened to a conversation between two girls, and one was explaining that if you want to make a straight line, you see, you go over a certain number to the right for each row you go up--that is, if you go over each time the same amount when you go up a row, you make a straight line--a deep principle of analytic geometry! It went on. I was rather amazed. I didn't realize the female mind was capable of understanding analytic geometry.
She went on and said, "Suppose you have another line coming in from the other side, and you want to figure out where they are going to intersect. Suppose on one line you go over two to the right for every one you go up, and the other line goes over three to the right for every one that it goes up, and they start twenty steps apart," etc.--I was flabbergasted. She figured out where the intersection was. It turned out that one girl was explaining to the other how to knit argyle socks. I, therefore, did learn a lesson.
For more fun with Feynman, his bestselling book Surely You're Joking, Mr. Feynman! (Adventures of a Curious Character)
