I graduated with a masters in physics almost 4 years ago, since then worked some jobs that required nothing I learned at university, now unemployed because of covid. I feel like using my free time to study maths/physics again, but this time just reading important authors direct from the source, perhaps in some kind of chronological order. I feel like at university I got nothing besides a mixed surface level overview of different areas & I don't properly understand anything. I want to read Euclid and perhaps more Greek mathematicians, then maybe Principia Mathematica etc. Has anyone here done something like this and positively benefited from it? Or is it a huge waste of time and textbooks are better?