What "Sin" or the "Sin Nature" Actually Is

 Around 2014-15, I started trying to understand what "sin" actually is from two things. First, the actual meanings of the words "khata'," in the Old Testament, and "hamartia," in the New Testament, in the original languages. The former is an archery term and the latter a javelin throwing term and both meaning the same thing, "to miss the target". What I came to discover the more I looked into "hamartia" in particular, being in the language of the New Testament, was that there was an implied unintentionality to this word. This comes out actually very strongly in the Greek Septuagint translation of Leviticus, for example, where there were sacrifices made available for "hamartia" but no sacrifices made available for intentional wrongdoing. In other words, if someone made a mistake, a sacrifice could be brought. If someone deliberately did something, no sacrifice was available for propitiation but that person had to suffer the penalty which the Torah prescribed. In ancient Greek, this word came to mean error, mistake, or the "fatal flaw" by which a hero perished in Greek Tragedy. In other words, it's most basic meaning is that something happened which wasn't intended to or supposed to happen. As such, I have also come to render it at times as "malfunction," or when it is in the plural, "malfunctioning behaviors."

The second thing I started from was two things Paul said about hamartia in Romans which I think have been overlooked too much. The first thing he says in Romans 5 is that it is inherited in that our first ancestor "sinned" so too all human beings descended from him are afflicted with it. The second thing he says is in Romans 7, and this is really interesting to me because he says that it is located "in the flesh." As you probably know, the word here is "sarx" and it literally means the flesh of an animal or human being, that is, the meat, skin, organs, etc. I know the NIV and maybe a few others render it "sin nature" but this is an interpretive translation and not a literal one. It's based on the translator's own theological biases. Paul located hamartia within the physical, biological flesh of a human being. So, according to Paul, Hamartia is inherited from our first ancestor and it is physically or biologically based. It should be noted that, contrary to popular theological teaching, nowhere in Scripture is "sin" ever called "spiritual" or implied to be of a "spiritual" nature.

Once I came to this conclusion, I asked two questions, "What if Paul meant what he literally said?" and "Is there any way to locate where 'in the flesh' it might be?" This led to my taking a psychology major at Orange Coast College. I reasoned that if hamartia is located "in the flesh" then it has to be in the brain because it deals with human behavior, and the source of human behavior is in the brain. Paul described it as an "error" or a "malfunction" or "fatal flaw" when he used the word hamartia. This suggested that there was a flaw or an error in the human brain. As I went through my coursework, one particular part of the brain stood out: the limbic system and specifically the hypothalamus and the amygdala. These are the parts of the brain responsible for our survival responses of fear, aggression, feeding, and sex, and in women, childbirth (this last one caught my attention because of Genesis 3). The hypothalamus is what controls these responses, but the amygdala is kind of like the gateway to the hypothalamus. It essentially tells the hypothalamus when to engage and when not to.

One of the things I did next was I went back and looked at everything Paul described as the "works of the flesh," now understanding this in a far more literal sense. In particular in Galatians, what I saw now was that every single thing Paul lists, every single behavior, can be attributed to one or more of these survival responses in some way. People commit murder out of fear. They steal out of fear. They commit adultery out of the drive for sex. They overeat or overindulge out of the drive to eat. All of these are neurologically based, biologically based responses to different situations and stimuli. Any behavior born from the fear, aggression, feeding, or sex response is a "work of the flesh" as contrasted with the "fruit of the Spirit" which is not born from "the flesh," that is, anything biologically based.

One of the things about the brain's survival response system is that, in virtually all other animals, it is meant to deal with physical threats or needs. That is, if an animal is threatened, it responds by either running from the threat or attempting to fight or destroy the threat. Once the threat is averted, the system is meant to shut down. Again, if an animal needs food, it directs the animal to eat. It also controls the sexual drive meant for reproduction in order for the animal to propagate. But once these needs are met, it is meant to go back into standby.

It does not fully do this in human beings, and it does not just do this with perceived physical threats and needs. Instead, it does it with things remembered or imagined. It does it with perceived likes or dislikes. It does it when one's "self-identity" is threatened, or it feels the need to propagate the things with which the self identifies. In short, it does it with perceived physical, psychological, emotional, and even spiritual needs or threats. In other words, it does it with "everything." It is my contention that this is also the source of what we call "good" and "bad" or "evil." Those things we like are treated as needs and therefore "good". Those things we dislike for any reason are treated as "threats" and are dealt with accordingly. We tend to crave and hoard those things we like, and we tend to push away, run from, or attempt to destroy those things we dislike. In short, our survival response system as human beings is stuck in overdrive, or is at least way too sensitive and far more sensitive then it was ever intended to be.

Another thing I ran into in my studies of this is that the human amygdala is disproportionately larger than in any other primate. It is four times larger than our closest genetic animal cousins the chimpanzee and the bonobo. Recently, I read an article where a correlation was made between a larger left amygdala and a higher intolerance for differences. So, the size of the amygdala directly impacts the scope of its function. My conclusion to all of this is that, because of an abnormal enlargement, relatively speaking, our amygdala as human beings is reacting and responding to things as threats or needs that it was never originally designed to react to. Now, this does not make it "evil," nor what it is trying to do "evil." It means though that it is not functioning in the way it was supposed to or intended to. In short, it is attempting to fulfill its original program by protecting us from threats and fulfilling physical needs but, I believe the evidence points to, its physical parameters have changed and now it's "malfunctioning." I had some experience with a similar problem with a machine in a job I once worked as a Laser Drill Technician where the machine was still following its program, but a slight flaw with the power output produced circuit boards that were entirely useless (I lost my job over that). Even the smallest change in the hardware parameters produced catastrophic results, and it is a similar thing with our amygdala.

So, our Hamartia is an enlarged amygdala processing "everything" as either a survival threat or a survival need and attempting to respond accordingly and mostly with fear of some degree. This is why I liken us to a child with a neurodevelopmental or behavioral disorder, because in a way, that is exactly what is happening. Now as to how it happened, my hypothesis is that it had something to do with a reaction to something found in the fruit which our ancestors ate. We know compounds can alter human genetics both immediately and in pregnancy, and some compounds can alter genes and pass down mutations. I think something in it caused our amygdalas to enlarge more than they were supposed to producing the aberrant, "sinful" behaviors as it attempted to protect us from things it really didn't need to.