One of the trippiest facts about reality is how your mind-body is making you experience the "cached" version of reality, like 99% of the time..
Unless something extraordinary/unexpected happens (prediction error), or you're practising real presence - you're basically living in a weirdly compressed copy (simulation) of reality.
This means you are NOT ACTUALLY seeing the screen you're reading this from, right now. You are NOT feeling your body directly. Even the colors and textures you see are in some ways degraded/compressed/cached versions of reality.
Your brain probably checked if this is true in real time and you might have felt some subtly perceptual shift visually or sensually - because you took conscious control, a bit.
It's not so hard to see: Between "you" and "real reality", there are layers. Some subtler, some more clear but one thing is for sure - you're not having DIRECT EXPERIENCE of reality.
Another way to test this is to make a conscious prediction about a regular daily action you take, whatever that might be. Looking out from the window, opening and typing on your laptop, whatever.. Make a conscious prediction (not mentally, but "sense/feel into it") by, for example, how it will feel doing the thing.
Then, do the thing fully consciously and being aware of it, and listen to the direct experience - see how it ACTUALLY feels, just observing it with no agenda, just to experience its direct experience. How big is the gap between your prediction (usually from your cache) and the direct experience? Even for the most ordinary things like putting on your socks, you'll be surprised at the delta.
And even more weirdly, some of the things you think you actually enjoy or like, etc are completely uncomfortable, unattractive, repelling, etc when you do it this way. Turns out, just like you didn't like the taste of wine or beer but gotten used to it, happen to distinguish between brands, and even love it now etc - you also have slowly grown accustomed to MANY things in your life.. Your cache formed.
This is why they talk about how "no one changes after 30" - all of the cache is formed and unless there's a BIG prediction error (=trauma), it doesn't really change.
However, very fortunately, we're living in a magical universe and there's this magical thing called the human will, consciousness. With it, and with knowledge, anything can be changed. And that's God's grace.