If you accept my theory that everything has always been there in one form or another, (and the things that it does) then it gets easier. And, indeed, it's logical.
On the question of light, I address this problem in my mind for an exclusive half-hour each day. It's clear that a source of energy emits light, which is why we can't see each other in the dark. If our eyes were IR sensitive, we could see each other. So there we have the proof that light is a waveform generated from energy.
Next, is light a particle? They seem to have isolated individual photons but they are said to be massless - and I believe that. Why? If, like the electron, photons are elementary particles (electron has mass - something elementary must have mass), then there is no need to explain their behaviour - like being bent by gravity. Rather interesting read:
https://profoundphysics.com/if-photo...have-momentum/
Btw, "always been there" then there is no "God the Creator".