I have come to the belief that there is a Creator who is everything (creation), and that creation (everything) is this creator's "thoughts", ie the creator trying to understand itself creates the increasingly complex world that we now know, and levels of illusion to obfuscate the truth (ie our limited physical reality despite the infinite possibilities that exist within our minds via thought, a direct a reflection of our origins as pieces of the Creator). Mathematics are essentially the true language of the universe/creation, and everything boils down to vibration (something more or less confirmed by advanced science, is it not?). This relates to stuff like why music can be so powerful to us and gives us intense & unique feelings approaching a spiritual deepness that we cannot get easily elsewhere, and why users of psychedelics report similar experiences at the extremes of their highs (never done drugs/drank so I can only go off of what I've heard from others for that - DMT machine elves, "the grid" and all that jazz). Our physical reality is explained in simple language as a reincarnation loop that we undergo until we consciously understand the true infinite creation and infinite "love", love being our term for the euphoric deepness we experience when exposed to something that brings us closer to the reality of creation beyond our current physical illusory reality
I don't want to run on forever so this explanation is really simplified and probably not well expressed, but it's the only metaphysical belief that has ever resonated with me and explains so much the feeling that there is something "more" that I have felt my whole life. I was raised secular and identified as an atheist for pretty much my whole life up until relatively recently. I've found that pieces of truth relating to this belief of mine seem to pop up in almost every religion, even in non-religions beliefs like Pythagorean numerology, which itself even deals with the idea that we are stuck in a reincarnation loop until we attain true understanding
As I've undertaken this belief I've noticed increasingly unlikely synchronicities in my life, nothing crazy or truly "supernatural" but coincidences that are too frequent and niche to ignore. Almost daily there will be something I think about or witness for the first time that is repeated or reflected in reality within a matter of hours. This one is easy to explain away as "well you just noticed it because you thought about it" but the increasing frequency and unlikelihood of the experiences has been hard to ignore, and I've hesitantly taken it as a sign that I am on the right path. Even if it's all a bunch of nonsense, the benefit it has had for me on a personal level to think this way has been too great already - everything makes so much more sense, nothing is left unaccounted for. I am enjoying all of "creation" and existing with a certain wholeness that I haven't felt since young childhood