Well I started out practicing divination and believed it may very well change. My first from of divination was Geomancy, and my view on it quickly changed as I bagan to use it and observe the results, because despite being a noob and not knowing the figures or any of the system as well as I should have, it would still be extremely accurate and give a very straightforward answer. It’s way more mechanical than other forms of divination and doesn’t rely much on intuition. Eventually I found around 80% of my charts to be accurate even though I was a noob. And if I look back now on the failed ones I can see the mistakes I made.
So that made me believe all this could be possible, and I’d say I’ve gotten visible results with around 70-80% with angelic magick, but I’ve only had like 20% of my chaos magick sigils produce results despite all the faith and the emotion. So that also makes me suspect magick is real, since different forms of magick may work very differently despite belief, whereas I think it would be more similar if it was just in the mind.