The set of lectures was gived by the one of greatest physicist in the earth, Richard Feynman. To me, I didn't take these lectures as my introductory course of physics. I learned physics using chinese books written by chinese physicists, I read textbook, I did many many exercises, but I really didn't appreciate the beauty of physics, and I didn't understand WHAT IS PHYSICS!!!. until I found Feynman's these lectures, I think it's him, Great Feynman, let me know what is physics! physics is not a collection of formula, not a set of mathematical equation, physics is a kind of art, physics is full of vividity!
In these lectures, Feynman exhibits his style of do physics, and show us his great ability of teaching. everything is natural, harmonious in feynman's book. I never feel any inconsistency in feynman's lectures. He told me the really physics: why we believe this and that theory? how we develop thisand that theory? what have we understanded completely,and what We havn't understanded? It is really enjoyment that reading it.
I believe there are not better book than the three volumes of lectures, and strongly recommend the timeless classic to any physics student!