The Sin of Onan

What was the sin of Onan? Let’s plunge into the Deeper Waters and find out.

Genesis 38 is a very odd chapter. I read it and I often wonder why Moses included this. Judah is the only son of Jacob besides Joseph that we have a feature section on. I can’t help but think God inspired Moses to write this because Judah is the one through whom Messiah Jesus would come.

There’s too much here to cover in one chapter, so today, I want to look at the sin of Onan. In this chapter, Judah has three sons. The first one is Er and all we know is he was wicked in the Lord’s sight, so the Lord put him to death. We don’t know what he did.

However, we know that his wife, Tamar, was barren at that point so Judah told Onan to lie with her and have children for his brother. However, Onan knew that any children that came would not be his. Therefore, whenever he was with Tamar, he would spill his seed on the ground so that she would not get pregnant.

So what did Onan do that was so wrong? Now let’s point something out at the start. It’s often said that the sin of Onan is either masturbation or birth control. I dispute both of those. At the same time, that doesn’t mean “This text doesn’t condemn masturbation or birth control, therefore both of those are okay.”

An important aspect of good reasoning is to be able to point out that not all arguments for your position are good arguments. I am a strong theist, but I do not think that all arguments for the existing of God are good arguments. I know some people who are Christians and critics of the minimal facts approach to the resurrection, but that surely doesn’t mean that they deny the resurrection.

So let’s look at what’s going on with Onan. Now this is not talking about masturbation because this is done when the two are together and there’s no indication that Tamar is giving him a hand job and if that was what was going on, why would it need to state that the seed was spilled on the ground? The reason it states that is because in sex, well there’s one place the seed is normally meant to go.

So is it about birth control? Again, I’m skeptical of this as the real question to ask is “Why was Onan trying to avoid pregnancy?” It could be hypothetically that trying to avoid pregnancy is wrong, but we should also ask regardless why it is being done. In this case, when we look at why Onan did this, we will see.

Onan was greedy.

Now that sounds confusing. Onan was greedy, therefore he engaged in coitus interruptus?

Yes. If Onan had any kids with Tamar, then Tamar would be the one to get the inheritance from Judah. Onan would miss out. Onan wasn’t only refusing his duty as a brother, he was trying to get all the benefits and look like he was still fulfilling it. In other words, Onan wanted wealth and was willing to cheat his family to get it.

If you want to condemn masturbation or birth control, you need to go somewhere else. This text is not about that.

In Christ,
Nick Peters
(And I affirm the virgin birth)

Why Is Tamar There?

What is Tamar doing in the genealogy of Christ? Let’s talk about it on Deeper Waters.

Tonight, I’d like to start looking at Christmas information and start with the genealogies of Christ. After all, around this time of year, Christians are asked a lot of questions about what we believe. The first place to start would be what we usually turn to at the beginning, and that is the book of Matthew, the first book of the New Testament. It starts off with a genealogy. What we’ll be looking at is a few of the unusual names in there.

First, why do these genealogies exist to begin with? I have a mother-in-law who enjoys doing genealogies and a cousin who does. Shortly after our wedding, my cousin gave me the Peters family genealogy. In there, I found information on myself and my parents of course, but then I was surprised to also find my wife was already included along with her family and her birthday. My cousin had really done his homework.

Genealogies were extremely important to Jews. You had to establish your pedigree in the ancient world. When Nathaniel says “Can anything good come from Nazareth?” he is speaking a common sentiment. When the Jews have a hatred of the Samaritans, they are also going along with this. Your origins story was extremely important, and this would have to be the most important story of all Matthew was writing. What were the origins of the Son of God?

As we go through the list, we find some names we don’t expect. The first one is Tamar. What is unusual about her?

To begin with, women were not usually in genealogies. This was about men. Matthew has a number of women in his which sets it out as unusual. This had to be a purposeful addition and since a writer would only want to include the most important information in a writing, there had to be some purposeful meaning behind what was said. Matthew wants us to know that Tamar is included in the lineage and not just Judah.

Establishing that Jesus is from the tribe of Judah is important since this is where the Messiah was to come from, but establishing Tamar was not. After all, we have no mention in this genealogy of Sarah, Rebekkah, or Leah, the respective wives of Abraham, Isaac, and Jacob. (Jacob did have Rachel and two concubines, but Judah was born through Leah.) The first mention we have of a woman is Tamar.

Note that I said woman and not wife. Tamar was not a wife. In fact, she was the daughter-in-law of Judah. The story is found in Genesis 38. Tamar was the wife of Judah’s son and that son was wicked so God put him to death. History kept repeating and Tamar was doubtful she would get a child then since Judah was hesitant to give his youngest son to her. So what did Tamar do? She disguised herself as a prostitute and waited for Judah to come by. Judah falls for the ruse and in that encounter, Tamar gets pregnant. She gives birth to Perez and Zerah. Perez is the one through whom Jesus comes.

In some cases in history, genealogies are given flavor to make the person look good, such as saying that one is descended from the gods. Part of the authenticity of the account of Matthew is that it includes such a shameful event. Every Jew would recognize it immediately, yet Matthew includes it. Why? Because it would not be denied for one point. The way the Christians dealt with a number of scandals was to admit them. We will look more at this in our look at the virgin birth so put it in the back of your mind for now.

Not only that, that a person of shame is used in the account can show the way of God in using that which is shameful regularly to fulfill His purposes. Many people wonder how God could use them, and the genealogy can indicate to us that anyone can be used. Also, not only can we be used, but our sinful actions can be. We should not seek to sin, but when we do, it cannot overturn the purposes of God. By biblical standards, the action between Judah and Tamar was wicked, but the child does not bear the blame. The child was still used to bring about righteousness for all people.

We today should be thankful to see these people in the genealogy of Christ and it can remind us of how the accounts are authentic due to the criteria of embarrassment that Tamar brings.

In Christ,
Nick Peters