Tag Archives: Intermarriage

Why is Judaism Matrilineal?

In this week’s parasha, Va’etchanan, God cautions His people about intermarriage (Deuteronomy 7:3-4). Although the Torah is speaking specifically about intermarrying with the Canaanite nations, the verses have always been understood as prohibiting intermarriage with any and all other nations. This is especially true because the Torah goes on to say that intermarrying will lead to the children being led astray and being turned to idolatrous ways. In those days, the Canaanites were not the only idolaters, of course—just about everyone was an idol-worshipper—so all intermarriage was forbidden. The Torah phrases the prohibition in an interesting way:

You shall not intermarry with them; you shall not give your daughter to his son, and you shall not take his daughter for your son, for they will turn away your son from following Me, and they will worship the gods of others…

While the Torah makes it clear that one must not marry their son to a gentile woman, or their daughter to a gentile man, it goes on to only mention that the son will be turned away from God, not the daughter. (The same is true in Exodus 34:16, “And you will take their daughters for your sons… and they will make your sons go astray after their gods.”) The Sages explain that women tend to be of greater faith than me, and as the primary builders of the home, it is the women who set the spiritual tone of the family. A faithful Jewish man who marries a non-Jewish woman will, sooner or later, be led astray. Such was the case with a great many Jewish men following the Babylonian Exile, and when they finally returned to Israel, they admitted (Ezra 10:2-3):

We have broken faith with our God, and have married foreign women of the peoples of the land; yet now there is hope for Israel concerning this thing. Now therefore let us make a covenant with our God to put away all the wives, and such as are born of them, according to the counsel of Hashem, and of those that tremble at the commandment of our God; and let it be done according to the law.

“Ezra reading the Law in the hearing of the people” by Gustave Doré

From all of the above, the Sages conclude that Judaism passes on maternally. Scripture makes it clear that only the non-Jewish mother will turn a Jewish man astray, and as we learn from Ezra, only those born to “foreign women” are not part of the Covenant. Aside from this, there are a number of other practical and spiritual reasons why Judaism must be matrilineal.

Since the mother is the one actually giving birth to the child, it is pretty much clear every single time who the child’s mother is. The same cannot be said of the father. Throughout history, when raping and pillaging was unfortunately very common, and there were no paternity tests, only the mother’s status as parent was evident. This may be why the ancient Greeks and Romans tended to be matrilineal as well.

Shaye J.D. Cohen points out (see chapter 9 of The Beginnings of Jewishness) that in Athens, only the offspring of an Athenian man and an Athenian woman could have Athenian citizenship, a law introduced by Pericles around 451 BCE. If an Athenian man married a foreign woman, the children would not be Athenians. Later, the Romans similarly held that only two Roman citizens can have a child who was a Roman citizen, and if a Roman married a foreigner or someone of a lower social class, the status or identity of the child would be that of the mother.

While these rules make sense from a logical perspective, they also recognize the profound connection that a child and mother have—far superior to that of child and father. And this ties into the deeper biological, and spiritual, reasons for why Judaism is matrilineal.

The Genetics of Motherhood

When it comes to the genes and traits of children, people tend to think that they are a 50-50 mix of mother and father. We learn in school how 23 chromosomes from the father (carried by sperm cells) meet 23 chromosomes from the mother (in the egg cell) to produce a new child. We are made to believe that even if the child may look more like one parent, they are nonetheless perfectly half-half. This is completely untrue.

A karyotype showing 23 pairs of chromosomes. (Credit: National Human Genome Research Institute)

First of all, when it comes to boys, the Y chromosome of the father is far smaller and carries significantly less genes than the mother’s X chromosome. Girls do have half of their father’s and half of their mother’s genes (receiving an X from each, along with the other 22 chromosomes). However, this only refers to nuclear DNA. The cell has other forms of heritable genetic material, too, most notably in mitochondria.

The mitochondrion is one of the most vital components of any cell, and provides the bulk of a cell’s energy. The main reason that you breathe is to provide oxygen for mitochondria. They are involved in countless processes, including calcium storage, cell signalling and communication, metabolism, hormone production, the breakdown of wastes (such as toxic ammonia in the liver), and apoptosis, or cellular death. A single cell could have over a thousand mitochondria.

Mitochondria under a microscope.

These mitochondria have their very own DNA, carrying hundreds of additional genes. This DNA, called mtDNA, is passed down strictly from mother to child. A father’s mitochondria play no role. In fact, because of this, geneticists are able to trace a person’s maternal lineage fairly accurately thousands of years into the past by analyzing mtDNA. (My own mtDNA—haplogroup U6a—dates back to a woman who lived in North Africa about 1000 generations ago!)

There are multiple other cellular components that are passed down almost entirely from mother to child. Because the sperm essentially donates only its nucleus (with its chromosomes) to the egg, it is the egg cell itself that begins to divide in producing an embryo. Thus, the bulk of a person’s cellular structure comes from their mother, too. Back in university, I had one biology professor who estimated that inheritance is not 50-50, but more like 80-20. From a scientific perspective, we are far, far more like our mothers.

This is one reason why mothers have such a deep and profound connection to their child. Amazingly, scientists have recently discovered that when a woman is pregnant, DNA (and whole cells) from the child actually goes into the bloodstream and ends up in the mother’s brain! Fetal cells have also been found in lungs, muscles, and heart tissue of mothers. A mother will literally carry the DNA of her children in her body for the rest of her life.

Just as children are physically more connected with their mothers so, too, are they more spiritually connected to their mothers. (After all, one of Judaism’s central principles is that the dynamics of this physical world are only a reflection of the spiritual realms.) And this is yet another key reason why Judaism is, and must be, matrilineal.

What About Conversion?

The genetics perspective brings up an important question: what about converts? A person who converts to Judaism is, of course, a full-fledged Jew. But their DNA hasn’t changed! It goes without saying that Judaism is not genetic, and the discussion of genetics above is meant to only be an analogy for spiritual processes.

Having said that, we have an opportunity here to bust another common myth: that a person’s DNA is unchanging. People are often taught that whatever DNA they are born with, they are stuck with. If they have a defective gene for a particular condition, then they will definitely develop that condition. Today we know that this, too, is not entirely correct.

As discussed before in detail, our body has epigenetic machinery which allows gene expression to be controlled. Just because a person has a certain gene does not mean that the gene will be operational. It can certainly be “shut off”. While it was once thought that our lifestyle choices have no impact on our genes or epigenetics, new research continues to show that the choices we make have a tremendous effect on our genes. We’ve known for a long time that things like diet and physical activity impact gene expression, and now we even have evidence that prayer and meditation affects our genes.

Therefore, a person who sincerely converts to Judaism, and begins to live a Jewish lifestyle, eat like a Jew, think like a Jew, and pray like a Jew, will very likely experience changes on the genetic (or epigenetic) level as well. And these epigenetic changes are hereditary.

This is yet another reason why it is so important to convert to Judaism properly. Converting means not only converting in name, but becoming Torah-observant and living a Jewish life. Otherwise, what’s the point of the conversion? This is precisely why Orthodox conversions tends to be so difficult and time-consuming. The rabbis want to ensure (as much as possible) that the person is serious about becoming a Jew, and will actually live as one.

The process is far from perfect, and sometimes they do make it too difficult and tedious. We have addressed this in the past as well. Some point out that it was never so difficult to convert in past centuries. This is true, as the Talmud (Yevamot 47b) explains the procedure thus:

Once healed [from circumcision], we immerse him immediately; and two scholars stand above him, and teach him a few easy commandments and a few difficult commandments. Once he has immersed and come up from immersion, he is part of Israel for all matters. If the convert is a woman, women sit her in the water up to her neck and two scholars stand outside, and teach her a few easy commandments and a few difficult commandments.

That’s all it took back in those days. A person was just taught a few introductory mitzvot while already immersed part way in a mikveh. They would pick up the rest when going on to live as Jews and marry into Jewish families. Even in the time of the Rambam (Rabbi Moshe ben Maimon, 1135-1204) hundreds of years later, he codifies this exact procedure as law (Mishneh Torah, Issurei Biah 14:6). Yet, in those days just about everyone was religious (whether Jewish or not). This isn’t the case in today’s secular society. A person who converts to Judaism wouldn’t necessarily learn how to be a Jew by simply marrying into a Jewish family. It is necessary to carefully teach them everything beforehand.

It is just as necessary to determine their real intentions, and affirm their absolute sincerity. In a world where people change their identities faster than they change their socks, it isn’t surprising that Orthodox rabbis take conversion very seriously and are extremely stringent about it. It is important to keep this in mind as we continue to hear about intermarriage and the “who is a Jew?” debate in the mainstream media.

Torah Laws You Really Should Keep – Even If You’re Secular

This week’s parasha is Yitro, most famous for the proclamation of the Ten Commandments at Mount Sinai. In the past, we’ve written how some of the Torah’s commandments are impossible to observe today, while others were never meant to be eternal to begin with. We wrote how God gave us the ability to reinterpret the law when necessary—as our ancient Sages did so skillfully—but at the same time, we critiqued those Reform leaders who essentially abrogated the mandatory observance of mitzvot. Many Jews today argue that they believe wholeheartedly in Hashem, and accept the divine nature of the Torah, but they do not accept rabbinic interpretations, or believe that God did not intend for us to keep the law today as it was millennia ago. Let us take this argument to its extremes.

Ignoring everything outside of the Five Books of Moses, let us look into the Torah and find only the laws that are clearly, explicitly, and undoubtedly proclaimed by God to be eternal. Indeed, what we find is that sometimes the Torah says a certain law is chok olam or chukat olam, an “eternal law”, or a brit olam, an “eternal covenant”, while most times it does not. Perhaps, just for a moment, we can entertain the possibility that God only intended laws affixed with this “eternal” description to be observed forever, whereas the rest might no longer be necessary. If so, what are the laws in the Torah which God explicitly says are eternal?

The Torah’s Eternal Laws

The Torah uses different language to affirm that a law should be kept in perpetuity. Sometimes it says the law should be kept l’dorotam or l’dorotechem (“for generations”) and other times it says mi’yamim yamima (“from day to day”). We will avoid such terms, for one can argue that they don’t necessarily mean for all generations or for all days. We will only use instances that undeniably say l’olam, “forever”.

Also, it must be remembered that we are only looking at the Torah’s ritualistic laws, chukim, and not the ethical and judicial laws, or mishpatim (like theft, murder, etc.), which are not exclusive to Judaism and just about the whole world recognizes and understands their necessity.

The first case of an eternal law is in Genesis 17, where God forges the covenant of circumcision with Abraham. Here we see the term l’dorotam l’brit olam (17:7) and then again l’brit olam (17:13). The next case is Exodus 12, where God tells us to celebrate the Passover holiday l’dorotechem chukat olam, repeated in 12:14 and 12:17. In Exodus, too, we have the eternal law of lighting the Temple Menorah (27:20-21), chukat olam l’dorotam, as well as the priestly washing before the Temple service, chok olam… l’dorotam (30:21).* Then, of course, we have Shabbat, l’dorotam brit olam (31:16).

Next, the Torah says the priesthood will be eternal, l’kehunat olam l’dorotam (Exodus 40:15). It is unclear whether this is an actual law (the verse is speaking specifically of the special oil for anointing the priests) or the Torah is simply affirming that Israel must always have priests. Leviticus 7:34-36 says that the priests deserve their terumah (a portion for the priests donated by the Israelites) l’chok olam and chukat olam l’dorotam.** Amazingly, terumah appears to be so important that it is described as l’chok olam at least another five times (Exodus 29:28, Leviticus 10:15, Numbers 18:8, 18:11, 18:19).

Continuing in similar fashion we get a total of seventeen explicit laws, as follows:

  1. Circumcision
  2. Passover (also in Exodus 12:24)
  3. Menorah (also in Leviticus 24:3)
  4. Priestly washing
  5. Shabbat (also in Leviticus 24:8)
  6. Anointing priests/eternal priesthood (also in Exodus 29:9)
  7. Terumah
  8. Not to consume chelev (certain prohibited animal fats) or blood (Leviticus 3:17)
  9. The mincha offering (Leviticus 6:11, 15 and 23:21)
  10. Not to perform priestly service inebriated (Leviticus 10:9)
  11. Yom Kippur (Leviticus 16:29, 31, 34 and 23:31)
  12. To sacrifice only to God/Not to sacrifice to demons or idols (Leviticus 17:5-7)
  13. Shavuot (Leviticus 23:21)
  14. Sukkot (Leviticus 23:41)
  15. Blowing the Temple trumpets (Numbers 10:8)
  16. Levites to serve God/prohibition for them to own land in Israel (Numbers 18:23)
  17. The Red Cow (Numbers 19:10, 21)

There are several more pertinent cases of “forever”: In fact, the very first instance in the Torah is with regards to Noah (Genesis 9), though that was a covenant over the rainbow with all of mankind, not strictly with the Jews. Secondly, Numbers 15:15 states that Jews and non-Jews should be equal before the law, chukat olam l’dorotechem, particularly with regards to sacrificial offerings. This is not necessarily a law in itself, but simply a proclamation of equality.

Thirdly, Deuteronomy 23:4 and 23:27 cautions Israel not to intermarry with Moabites or Ammonites, or even allow them to convert, ‘ad olam. This does not say definitively that the law is eternal, but that Jews should never accept these particular nations, or at least not to accept them for ten generations. The latter case makes the most sense, since we see that the righteous Boaz married Ruth the Moabite (the grandmother of God’s beloved David), and Solomon married Na’amah the Ammonite. Regardless, there are no more Moabites or Ammonites in our days to worry about.

Fourth, Exodus 19:9 has God promising Moses that the Israelites will believe in him l’olam, forever. This is not a law commanded to Israel; simply a promise made to Moses. And lastly, Deuteronomy 29:28 famously states that “the secret things are for Hashem, our God, and the revealed things are for us and for our children forever to do all of the words of this Torah.” Although the verse suggests we must fulfil the whole Torah forever, it can also be read to mean that we were simply given the Torah forever. The verse says we must “do” (or “complete”) its words—so one can argue it is not necessarily saying to fulfil its mitzvot. It may even be referring to Torah study and interpretation, hence the verse explicitly speaks of secret and revealed teachings. In any case, it can be argued there is no clear law stated here, just a general principle of the Torah’s eternity.

The Minimal Torah

Of the seventeen eternal laws listed above, we find that ten are impossible to observe today because there is no Temple. Most of them can be reinterpreted ever so slightly to make them observable (for example, netilat yadaim, Shabbat and Chanukah candle-lighting, and charitable donations, as discussed in the footnotes below). Or, when Mashiach comes and the Temple is rebuilt, those ten will once more be observed. In the meantime, there are seven clear eternal laws left:

  1. Circumcision (Genesis 17:10-14)
  2. Passover (Exodus 12:14-20)
  3. Shabbat (Exodus 31:13-17)
  4. Not to consume chelev (certain prohibited animal fats) or blood (Leviticus 3:17)
  5. Yom Kippur (Leviticus 16:29, 31, 34)
  6. Shavuot (Leviticus 23:21)
  7. Sukkot (Leviticus 23:41)

We can now go back to our initial question. For the Jew who accepts Hashem and His Torah, but wants only the scriptural laws that are undoubtedly eternal (assuming all others have become “outdated” and/or without any additional rabbinic interpretations), they are still obligated to observe these seven at the very least. That means keeping Shabbat, which even according to the plain, overt meaning of the Torah requires desisting from one’s weekday labour and not dealing with any flames (including a combustion engine vehicle and barbeque). It means keeping seven days of Pesach, with matzah and no chametz; fasting on Yom Kippur; commemorating Shavuot; and all seven days of Sukkot, in a hut. And while essentially all the laws of kosher seem to be gone, there is still a prohibition of consuming chelev and blood, thus basically invalidating the consumption of any meat that isn’t certified kosher!

Over the years, I’ve met many Jews who made the argument in question, yet none of them really kept these mitzvot. Oftentimes, this argument is only an excuse for not observing anything. If you really know there is a God, and believe in the Torah, even if only the Written, at the very least start with these. Otherwise, you are guilty of hypocrisy. And the Talmud (which you may not appreciate just yet) states in more than one place that God absolutely detests the hypocrite.

‘Moses on Mount Sinai’ by Jean-Léon Gérôme (c.1900)


*I believe that this phrasing is what gave the Sages the basis to establish the rabbinic mitzvot of lighting Shabbat candles, Chanukah candles, and netilat yadayim. These are three of seven mitzvot which are rabbinic in origin, yet we recite a blessing on them as if God Himself commanded, asher kidishanu b’mitzvotav… God did command that we must light candles and wash before serving Him forever, so the Sages instituted these laws, as a way of fulfilling God’s eternal command.

**The Talmud implies in multiple places that in lieu of priests serving in the Temple, we have rabbis who are devoted to Godly service. Indeed, the non-Jewish world often sees rabbis as priests, and in most countries they are considered “clergy”. Perhaps the Torah means there must always be spiritual leaders for Israel. Similarly, although there hasn’t been terumah since the end of the Temple days, we are obligated to donate a portion of our income. While ma’aser (tithe) refers specifically to agriculture, the Torah uses terumah more flexibly, and it can refer to voluntary financial contributions as well. The fact that terumah is mentioned more than any other mitzvah with regards to being eternal should teach us that being charitable is of utmost importance.

Note: all of the above applies to Christians, too, who also accept the Torah (at least as the “Old Testament”) but generally do not fulfil its precepts. It is commonly believed that Jesus abrogated Torah law, or replaced it, or that it isn’t necessarily to fulfil Torah law because the path to Heaven is supposedly only through Jesus anyway. This is very flawed reasoning, especially when considering that Jesus himself explicitly stated (Matthew 5:17) that he did not come to repeal the Torah’s laws, but rather to ensure their fulfilment! On the validity of Christianity as a whole please read here and here.