By George, I think he's got it!<br><br>(And, more to the point, perhaps I finally get it as well.)<br><br>What a great way to look at physics. Obviously other approaches have their strengths as well. But, this is a way to get a handle on the BIG PICTURE, the big fat, "What's it all about?" question.<br><br>It's all about symmetry!<br><br>Now, wouldn't it be wonderful if I knew about this book BEFORE I read the standard textbooks on quantum mechanics and quantum field theory?<br><br>Ah yes, c'est la vie!<br><br>Still, Great Job Jakob!<br><br>(p.s. -- make sure you have a compatible device. I know a lot of other Kindle versions don't support a crisp font that resizes formulas, something a kin to PDF formats. This Kindle version requires a device that supports advanced fonts.)