Many people have taken one look at this and inmediately leaped to the conclusion that Jedi forbid emotions. Which is, huh… interesting.
What people don't realize is that the Jedi Order are a religious organization, and as such they have their own sacred texts, such as this meditation mantra (because yeah, that's the only time it's ever mentioned, during meditation).
And the trick about this kind of texts is that they're not meant to be taken literally. You're not supposed to take it at face value, you're supposed to think about it, reflect about it, and then interpretate it. I'm sure the average "fan" hasn't actually thought about it beyond "code bad Jedi evil", nevermind that it's not actually the Jedi Code mentioned in the films.
Since it's a meditation mantra, one used to focus to make connecting with the Force easier, it makes perfect sense that this is how you should feel when using the Force.
You shouldn't be overwhelmed with emotions or passions, you shouldn't act if you don't have knowledge. This is obvious: if you can command the essence of life, then maybe you should actually be in the state of mind to do it.
However, the other lines of "no chaos but harmony" and "no death but the Force" don't fit into this. So, what do they mean?
Here is the other version of the Code. It was seen for the first time in the Kanan comics, and is arguably more canon than the previous one.
(People have called it the Gray Jedi Code, which is hilarious in and on itself and another point in favor of the argument that the so called Gray Jedi are just canon Jedi.)
I'm sure everyone can agree that this one is good.
Feel, but find peace in your emotions. Know nothing, but figure it out. Suffer, but look past it to find serenity. Just like there is chaos, there is harmony. And just like there is death, there is the Force.
But what if I told you that both Codes are saying the same thing?
I know, I know. You probably think I'm crazy, but… what if they're saying the same things, in different ways?
To expand on the interpretation that the first one is how you should be when using the Force (and I admit with my whole chest that this is my interpretation), we can say that the Force isn't naturally things like emotion and chaos. They are only what we bring with us.
That doesn't make them any less real. They are, and they are important, but they are subjective experiences. Everyone will have different emotions, different passions, different things they are ignorant of. Even death, even as it will come for everyone, is something private and personal. I don't know what X person felt or thought when they died.
However, things like peace, harmony and the Force are universal.
Chaos (noun): "complete disorder and confusion." "the property of a complex system whose behaviour is so unpredictable as to appear random"
Dictionary definition, bear with me. "Whose behavior is so unpredictable as to appear random". It isn't random, it has patterns and reasons to happen just like everything else. We simply don't know those patterns. Ignorance, yet knowledge. Just because we don't know something doesn't mean we can't learn it. There is no ignorance, there is knowledge. Therefore there is no such thing as chaos, not really, just a pattern, an order, a harmony, we don't know yet. First definition is about human reaction, not anything about the object itself. There is no chaos, there is harmony.
Emotion, ignorance, passion, chaos, even death. They are all feelings, subjective experiences, things that, ultimately, can change as you find new understanding (well, death only happens once and is permanent but you get the point). But inner peace, knowledge (about situations, about people's reactions), serenity and harmony are all universal. They exist, and will exist long after we die, we just have to find them.
And, long as we remember people, as we understand that all lives have left a mark, big or small, we will keep those who have passed alive within our hearts.
Death, yet the Force. There is no death, there is the Force. Or, perhaps…
"(The Force)'s an energy field created by all living things" Obi-Wan Kenobi, ANH
"Luminous beings are we, not this crude matter" Yoda, ESB
"No one's ever really gone" Luke Skywalker, TLJ
Death, yet the essence of living beings. There is no death, there is life.