I study Physics at college and I'm on the third year. Currently, I'm facing a very complicated problem: I can learn advanced math, do complicated proofs, but I simply can't read Feynman's Lectures on Physics. Until now, I just had classes about physics for engineers (Halliday's book), so no teacher taught real physics, their classes was basically just pass formulas for people to remember and apply without understanding the phenomena, or the reasoning that a theoretical physicist need. On the other hand, I also had advanced math classes, like analysis over R^n, analysis on manifolds, linear and multilinear algebra, done both with vector spaces and modules. All of that kind of math I can understand, and I can do well with any book of these topics. Since there were no classes about real theory of physics, I asked a teacher from the university that I know, and he told me to read Feynman's books. The problem is that I'm trying for months and I simply can't understand his reasoning. I've read multiple times his way to derive the gravitational potential energy expression, but I simply couldn't understand all of that reasoning with perpetual motion and so on. Then I've moved to the next chapter about measurements of time, and I also simply cannot graps all of those experimental methods. I really don't like the idea of understanding math without understand physics. I really want to be a physicist, not a mathematician. And despite all of that, I would really like to understand Feynman's book, since it seems to be very interesting. Does anyone has a suggestion so that I can understand Feynman's reasonings and move on? I've googled about video lectures, but there are no lectures on classical Physics on the lines of those books. All the videos I found are again aimed at engineers, and this really isn't what I'm looking for. I don't know if any other person also faced this kind of situation, but if someone did, I would really like to know how to deal with Feynman's books. Any help or suggestion is welcome. Thanks very much in advance.