I could be wrong here, but I suspect that if you understand physics, and you understand Greek and Roman philosophy, you pretty much understand life.
Philosophy teaches us about the internal world –that of self-examination and why we do everything we do, so we can live the best life we can– and physics teaches us about the external world –how everything interacts with everything else in the physical world. It’s also no coincidence there’s a lot of crossover between the two. And no coincidence that one of the greatest philosophers in history, Plato’s student Aristotle, revolutionised the latter and had a huge influence on the former.
I might’ve left out one crucial other part of life though: relationships (and how we interact with other human people). That’s one I don’t know where to get the info on. And I know nothing about all three, but I’m working on it.