Check out the first part here: A seemingly simple question: What is light?
Ever since I stimbled upon this video I can't quite get it out of my mind. The implications are so profound that it boggles my mind. If you feel the same, then perahps you feel like hearing more about this view on light.
There is a somewhat controversial youtuber that also tackles this question. I wouldn't say that I agree with everything he says (and you have to get over his strange sense of humor), but I still find it quite revealing.
Anyway, hope you get to learn something and always use your mind! 😉