I have an incomplete set of rules in this life which I've developed over the past decade, after spending one decade being raised Roman Catholic, then 2 decades as a die hard atheist. I now consider myself an omnitheistic solipsist. I use that term because it sounds cool and usually gets religious recruiters and cultists to leave me alone. The idea is that all things, not just religion based literally everything imaginable and more, has already happened, is currently happening and will continue to happen indefinitely. Sentient beings each live within their sphere [or other shape or even shapeless] of reality. Their reality is theirs, their beliefs are true for them so long as they believe it. When interacting with other sentient forms, the realities mingle. Shared beliefs bring agreement, conflicting beliefs repulse but both are still truth for each entity until one truth overwhelms the other and a belief is changed or they part ways and continue existing in their own reality. Time is a fractal recursing, your future may be my past, my dreams could be a past life in my future. Each and every being, as well as those which are considered lifeless to humans, are made up of many 'points', which I use the term 'philote', shamelessly stolen from Orsen Scott Card's Ender saga. They are not a score nor are they sharp. They are like the mathematical point on a line or in a graph. These philotes exist as part of reality as we know it, or perhaps a smidge beyond our abilities to detect right now. They form clusters within living things, planets, everything, every animal, plant, rock, molecure, atom etc. They cannot cease to exist. That is the primary rule, they are never destroyed. Yes, that breaks the 'already happened, will continue to happen' statement made earlier, if you're still with me this far, just keep going. If one ever appears to be destroyed it is actually shifting orthogonally through time and reality to its next existance. Some move backwards through what we know as time. Some spring forward and backwards in a spiral. There is chaos and there is order. It is all part of 'the big bang and the big suck'. As humans currently exist we are in a post-bang era. As the universes expand black holes grow larger and over a long time will eventually grow, consuming each other until all that is left is a singularity, all mass and all of the philotes joined into one. The black hole inverts, becoming the next big bang. This cycle is endless and each time it expands it is doing so simultaneously as the opposite contracting. An infinite number of these cycles are all infinitely occuring. When you meet someone and instantly become friends or when you see a stranger and kow for some unknown reason that you don't like or trust that person, that is your philotes within you remembering or recognizing other philotes from their past or their future. Or they see their path and want to take a different one. Remember, at some point all was one, this was all part of a big plan, except it is not planned at all. It is a story being told in every way, an act of boredom brought on by the singularly, wanting to experience it all. Or the inner turmoil it felt of wanting to feel happy while kowing it ust feel sad to do so. It is a spinning yin-yang, a lemniscate to the infinite power angled an infinite degrees. At times our philotes guide us, at times they let us take them to a new experience. You have already mapped out your life, from a different existance, tweaking events to push you in the direction you think you need to go to properly understand the later lessons in your current life.
To continue slightly less abstract, I also have made more low level rules for my current run. They are based off the rules all religions I know of have, the most important being a variation on the Golden Rule. "Treat everyone as if they were a friend or close family member." That is all most should ever need. I still made more, a work that is still in progress which I hope to never complete and probably will never publish. I wont even share them all here, since I doubt many have read this far and because of self doubt. "Always look out for #1 and always be prepared for a #2." Yes, there is a poop joke in there. There's enough ambiguity as well to allow for multiple interpretations. "Plan ahead, don't wait; take care of your needs, before it's too late." That's the other wording for the same rule. "Only desire what you require. Create more than you consume." A rule made when I quit watching the news, TV and movies and quit playing videogames. "Lift people up before taking anyone down." It helps to gather an army first but more important, if you lift enough people up, there's no one left at the bottom. Lower the bar. "Electric chairs for billionaires. They only time it is theft, is when the victim needs it more." Emphasis on "need" and if you aren't a billionaire, you are a victim. "If an opponent angers you, you've already lost. Any enemy can be defeated with unconditional love." That one probably needs more explaining. Instead, I'll try to end this existentialist madness. My first post and/or comment ever on this site.
To answer the initial question: Left, indented once if "your existence" starts the first sentence of a paragraph. Centered if it is the topic or chapter title. To anyone who read this entire thing, thank you and I hope you have a nice day.