So here are 4 facts/truths that even the most advanced physicists, neuroscientists and philosophers tend to forget. Actually 3 truths + 1 conclusion based on those 3. These aren't anything you need to wrestle your mind to understand - in fact if you engage your mind, it'll just chew on it endlessly with no conclusion, because that is what minds do. Not necessarily "bad" - prob healthier to chew on mentally than most things but Unnecessary/overkill. You "relaxingly" deep down inside know these to be true, but almost everybody ignores the truth and falls for Life's hamsterwheel-like traps instead.
1. You are never attached to anything in life.
Everything changes, and passes away. Everything comes and goes, rises and falls. Even peace and happiness. Everything in this reality "moves." But this isn't like Buddhism "Detachment" - they are correct that everything is impermanent BUT you do not need to practice Anything nor force any sort of detachment. You are already non-attached to everything. The one thing that DOESN'T change is YOU. People, places, things, emotions - all change in front of You. You are the one consistently noticing it. If everything is going, has gone away, and will go away - what it means is NOTHING STICKS TO YOU. You, who is experiencing these things, are not attached to anything. A mind may develop "attachments" through wants and likes and dislikes, but YOU - the one who notices the mind, are not attached to any of it. Even your mind can't stick to you. The mind itself disappears when you're in deep deep sleep without being able to affect you. So what are you trying to give up/improve? All pleasure and suffering is in the the world, the body, and the mind. You, yourself, are never attached to the phenomenon you experience.
2. The entire universe/multi-verse exists in You
The entire universe/multi-verse is not separate from you, it borrows its existence from YOU. The entire experience of "reality" and everything that appears to come and go, comes and goes with You. It is not apart from you, it IS YOU. You ARE the universe you experience. It is Impossible to experience anything outside of your consciousness. Whatever is experienced is experienced in Your Awareness. That which appears in your consciousness is not separate from it. The whole universe arises and disappears in You, like waves in the ocean - the waves Are the ocean. Everything - from people, enemies, galaxies, concepts like space-time, movement etc.- is all You. Similar to how every character and world in a dream exists, but not separately - they borrow their existence from the dreamer, arise and disappear back into the consciousness that is the dreamer. It's all just ONE thing, and that ONE Thing is You. You have never experienced anything outside your own awareness. ONE-ness: You are everything you experience.
3. None of it is real, except You.
Because it all only exists within You, and you experience it all coming and going, it is NOT you - but it is In you. At the same time you could say that it IS you, but not real. It may seem tangible (You can't hold anything for long actually, so it doesn't seem tangible at all when you think about it); it may seem more "real" than a dream because it changes at a slower pace, but it is not. There is no Reality to it. In fact, even the notion of slow/fast pace is within you, and not inherently real. It exists, but is not real. Like the difference between someone telling the truth, someone telling a lie, and someone not saying anything at all. The person telling the truth is saying something, and it's true (exists and real). The person not saying anything at all, neither tells the truth nor lies (doesn't exist, not real). The person telling the lie is actually saying something, it's just not true (exists and Not real). The whole universe/multi-verse borrows its existence from you, but it's not you - and it doesn't have its own existence, it borrows existence from You - it is not non-existent, it is false. You "made" it up. And "made" is in quotes because even the concept of you Doing anything is part of the false empirical reality.
You are all of space-time and beyond itself, past+present+future are all there in you. Even in "empirical reality" there is no free-will, there is no cause and effect - they are illusions. Free-will/causation would imply the future doesn't exist yet, which is nonsense. BUT even if you could logically argue such nonsense, when you look deeper, even what may be true empirically has no substantive reality.
This one might be confusing, so think of this pic:
Is it two people about to kiss (the black parts)? Or is it a candle stick (the white part)?
Answer: it's NEITHER. It's just a bunch of lines. You've assigned such meaning to those lines. In fact you've even assigned the meaning of a line to whatever it is you've decided makes a line. It's all You, none of it is Real - there is only you pretending what you imagine is real.
ALL IS FALSE, ONLY YOU ARE.
4. You are complete in yourself, and unaffected by anything your experience.
You Are (period). Anything past the notion of "I AM" is nonsense. Anything beyond the notion of "I AM" is manufactured/imagined. You, yourself, are serene (not happy and in peace, those are qualities of the mind, but stable/serene/still/untouchable) whether in pain or in pleasure, in hope or despair, dead or alive, or whether happy or suffering. Serenity is not a quality of the mind, it's the very nature of yourself. Stillness, unchanging, you can't add or subtract from you. Suffering is just an experience of the mind calling something it imagined as suffering. Pleasure is just an experience of a mind calling something it imagined as pleasure.
The mind will continue to feel suffering and pleasure, falsely labeling things as good/bad. Suffering/pleasure will be experienced - but it is nothing to You. In the background there will still be the unchanging serenity that you are.