I'm about to give you all the single most powerful piece of advice that was ever told to me:
It is important to be a principled person.
This is more important than being a good person. But don't take this to mean I think we should be bad people.
The reason why "being principled" has more weight than "being good" is because the definition of "good" is arbitrary. It changes depending on who you ask, which means the standards of achieving goodness are always going to change and pose contradictions.
Principles are different. They are more actionable and concrete. Principles are ideas and concepts you personally value, in that you find them valuable to your lived experience. This makes them different than something like a commandment, because they're not a doctrine. Their source is your personality—who you are and the experiences that have shaped you—rather than your goals and ambitions alone.
To give an example, here are a few of my own principles:
I value self-sovereignty. I think it's a person's inherent right to be free of undue influence, and to act as agents of their own free will. (Not to be confused with acting with impunity; people have the right to experience the consequences of their own actions the same way they have the right to act upon their own free will.)
I value people. I show people courtesy as a baseline, even during arguments, until it becomes clear the other person simply wishes to engage in the spirit of hostility. And even then I don't really lash out—I just leave. At no point do I lose sight of the fact that the people I'm interacting with are as real as I am, who have feelings and complex lives the same as I do. This means I also really value trying to understand where people are coming from, and to look at things from their perspective, even if I don't agree with it.
I value being accurate, as opposed to being right. This has been a more rewarding approach for me, by comparison.
I value discernment. I want to know what things are, which means differentiating them from what I think they are from what they seem to be, and from what they are not. The reason why I practice discernment is due how I think—my brain understands things based on how they are, rather than based on what they are—but the reason why I value discernment is because it allows me to interact with the world in a much deeper way.
I value being a mammal. Life becomes easier when I (to quote another Tumblr post) let the mammal that is my body love what it loves. Fighting against this in the past proved to be a pointless and joyless endeavor.
I have more, but these are just the things that come to me off the top of my head. And keep in mind, these will likely change as I change as a person, because that is how principles work.
To be honest, I've never put much thought into whether other people should have the same principles as me; people have different personalities and lived experiences than I do, so it makes sense to me that we would all prioritize different things.
But what I do know is that I fundamentally disagree with people whose principles are antithetical to my own, principles like conquest (of self or other), conformity, purity, and controlling others. Whether or not someone realizes they're embodying these principles is another story, but in any case it's how I know who to avoid engaging with. This is regardless of someone's political alignment or identity.
In my opinion, thinking this way makes it easier to stay grounded in a rapidly-changing world, and to remain focused on what's actually important to you in the face of the unknown. It allows you to find stable ground within yourself.