Astrology

[Then in the vision, God] took him outside and said, “Look toward heaven and count the stars, if you are able to count them”—continuing, “So shall your offspring be.”

ויוצא אתו החוצה AND HE BROUGHT HIM FORTH OUTSIDE — Its real meaning is: He brought him outside his tent so that he could look at the stars. Its Midrashic explanation is: Go forth from (give up) your astrological speculations — that you have seen by the planets that you will not raise a son; Abram indeed may have no son but Abraham will have a son: Sarai may not bear a child but Sarah will bear. I will give you other names, and your destiny (מזל planet, luck) will be changed. Another explanation: He brought him forth from the terrestrial sphere, elevating him above the stars, and this is why He uses the term הבט ‘‘look”, when He said “look at the heavens” — for this word signifies looking from above downward (Genesis Rabbah 44:12).

Then Pharaoh charged all his people, saying, “Every boy that is born you shall throw into the Nile, but let every girl live.”

לכל עמו This may be translated AND PHARAOH GAVE COMMAND REGARDING ALL (לכל) HIS PEOPLE — Regarding them, too, he made a decree (Sotah 12a). For on the day when Moses was born his astrologers said to him, “To-day their deliverer has been born, but we know not whether he is born of an Egyptian father or of an Israelite; but we see by our astrological art that he will ultimately suffer misfortune through water”. Pharaoh therefore made a decree that day regarding the Egyptians also, as it is said here, “Every son that is born [ye shall cast into the river]”, and it is not stated “[every son] who is born to the Hebrews”. They (the astrologers), however, were not aware that Moses was ultimately to suffer misfortune through the waters of Meribah and not through the waters of the Nile (Exodus Rabbah 1:18; Sotah 12a; cf. also Rashi on Numbers 20:13).

The Gemara comments that this disagreement is parallel to a dispute between tanna’im: The Torah states: “And the Lord blessed Abraham with everything [bakkol]” (Genesis 24:1), and the Sages disagree about what bakkol means. ... Rabbi Elazar HaModa’i says: Abraham our forefather was so knowledgeable in astrology [itztagninut] that all the kings of the East and the West would come early to his door due to his wisdom. This is the blessing of bakkol, that he possessed knowledge that everybody needed...

The Gemara expounds the verse “and He brought him outside” (Genesis 15:5): Abraham said before Him: Master of the Universe, I looked at my constellation and according to it I will have only one son, and a son has already been born to me, i.e., Ishmael. He said to him: Emerge from your astrology because there is no constellation for the Jewish people, as they are not subject to the influence of astrology.

Rabbi Hoshaya said: Anyone who acts wholeheartedly, time will stand for him, i.e., he will be successful, as it is stated: “Walk before Me and you should be wholehearted” (Genesis 17:1), and it is written: “And you shall be the father of a multitude of nations” (Genesis 17:4).

Rabbi Yehuda HaNasi said: Anyone who divines, i.e., he guesses and looks for signs about the future, the sign will injure him, as it is stated: “For there is to him [lo] divination with Jacob” (Numbers 23:23). The Gemara asks: But it is writtenlowith the letters lamed alef, meaning “no divination,” as opposed to with the letters lamed vav, meaning “there is to him divination.” The straightforward meaning of the verse is that there is no divination with regard to Jacob. Rather, the reason that he will be injured is not based on the verse but rather due to the concept of measure for measure: Since he attempts to tell his fortune, it injures him.

And from that which transpired to Shmuel, one can also conclude that there is no constellation for the Jewish people. The Gemara relates that Shmuel and the gentile sage Ablet were sitting, and they saw these people were going to the lake. Ablet said to Shmuel: This person will go and he will not return, because a snake will bite him and he will die. Shmuel said to him: If he is a Jew, he will go and come back. As they were sitting for a while, the person they discussed went away and then returned.

Ablet stood up, threw down the person’s burden, and inside he found a snake cut and cast in two pieces. Shmuel said to him: What did you do to merit being saved from death? The person said to him: Every day we all take bread together and eat from the bread. Today, there was one of us who did not have bread, and when it came time to gather the bread, he was embarrassed because he did not have any to give. I said to the others: I will go and take the bread. When I came to the person who did not have bread, I rendered myself as one who was taking from him so that he would not be embarrassed. Shmuel said to him: You performed a mitzva. Shmuel went out and taught based on this incident that even though it is written: “And charity will save from death” (Proverbs 10:2), it does not only mean that it will save a person from an unusual death but even from death itself.

And from that which transpired to Rabbi Akiva as well it can be derived that there is no constellation for the Jewish people, as Rabbi Akiva had a daughter, and Chaldean astrologers told him that on the same day that she enters the wedding canopy, a snake will bite her and she will die. She was very worried about this. On that day, her wedding day, she took the ornamental pin from her hair and stuck it into a hole in the wall for safekeeping, and it happened that it entered directly into the eye of the snake. In the morning, when she took the pin, the snake was pulled and came out with it.

Her father Rabbi Akiva said to her: What did you do to merit being saved from the snake? She told him: In the evening a poor person came and knocked on the door, and everyone was preoccupied with the feast and nobody heard him. I stood and took the portion that you had given me and gave it to him. Rabbi Akiva said to her: You performed a mitzva, and you were saved in its merit. Rabbi Akiva went out and taught based on this incident that even though it is written: “And charity will save from death” (Proverbs 10:2), it does not mean that it will save a person only from an unusual death, but even from death itself.

And from that which transpired to Rav Naḥman bar Yitzḥak as well it can be derived that there is no constellation for the Jewish people, As Chaldean astrologers told Rav Naḥman bar Yitzḥak’s mother: Your son will be a thief. She did not allow him to uncover his head. She said to her son: Cover your head so that the fear of Heaven will be upon you, and pray for Divine mercy. He did not know why she said this to him. One day he was sitting and studying beneath a palm tree that did not belong to him, and the cloak fell off of his head. He lifted his eyes and saw the palm tree. He was overcome by impulse and he climbed up and detached a bunch of dates with his teeth. Apparently, he had an inborn inclination to steal, but was able to overcome that inclination with proper education and prayer.

After citing relevant halakhot written in the notebooks of various Sages, the Gemara relates that it was written in Rabbi Yehoshua ben Levi’s notebook: One who was born on the first day of the week, Sunday, will be a person and there will not be one in him.

The Gemara asks: What is the meaning of the phrase: There will not be one in him? If you say that there is not one quality for the best, that cannot be, as Rav Ashi said: I was born on the first day of the week, and one cannot say that there was nothing good about him. Rather, it must mean that there is not one quality for the worst. Didn’t Rav Ashi say: I and Dimi bar Kakuzta were both born on the first day of the week. I became a king, the head of a yeshiva, and he became the head of a gang of thieves, clearly a negative quality. Rather, one born on a Sunday is either completely for the best or completely for the worst. What is the reason for this? It is because both light and darkness were created on the first day of Creation.

One who was born on the second day of the week, Monday, will be a short-tempered person. What is the reason for this? It is because on that day, the second day of Creation, the upper and lower waters were divided. Therefore, it is a day of contentiousness.
One who was born on the third day of the week will be a rich man and a promiscuous person. What is the reason for this? It is because on that day, the third day, vegetation was created. It grows abundantly but is also mixed together without boundaries between the grass and the plants.
One who was born on the fourth day of the week will be a wise and enlightened person. What is the reason for this? It is because the heavenly lights were hung in the heavens on that day, and wisdom is likened to light.

One who was born on the fifth day of the week will be a person who performs acts of kindness. What is the reason for this? It is because on that day the fish and fowl were created, and they do not receive their sustenance by performing work for people. They are sustained by the kindness of God alone.
One who was born on the sixth day of the week will be a seeker. Rav Naḥman bar Yitzḥak said that this means that he will be one who seeks out mitzvot, as most of the activity on Friday involves preparation for Shabbat.
One who was born on Shabbat will die on Shabbat, because they desecrated the great day of Shabbat on his behalf. Rava bar Rav Sheila said: And he will be called a person of great sanctity because he was born on the sacred day of Shabbat.

Rabbi Ḥanina said to his students who heard all this: Go and tell the son of Leiva’i, Rabbi Yehoshua ben Levi: It is not the constellation of the day of the week that determines a person’s nature; rather, it is the constellation of the hour that determines his nature.
One who was born under the influence of the sun will be a radiant person; he will eat from his own resources and drink from his own resources, and his secrets will be exposed. If he steals he will not succeed, because he will be like the sun that shines and is revealed to all.
One who was born under the influence of Venus will be a rich and promiscuous person. What is the reason for this? Because fire was born during the hour of Venus, he will be subject the fire of the evil inclination, which burns perpetually.
One who was born under the influence of Mercury will be an enlightened and expert man, because Mercury is the sun’s scribe, as it is closest to the sun.
One who was born under the influence of the moon will be a man who suffers pains, who builds and destroys, and destroys and builds. He will be a man who eats not from his own resources and drinks not from his own resources, and whose secrets are hidden. If he steals he will succeed, as he is like the moon that constantly changes form, whose light is not its own, and who is at times exposed and at times hidden.
One who was born under the influence of Saturn will be a man whose thoughts are for naught. And some say that everything that others think about him and plan to do to him is for naught.One who was born under the influence of Jupiter [tzedek] will be a just person [tzadkan]. Rav Naḥman bar Yitzḥak said: And just in this context means just in the performance of mitzvot.One who was born under the influence of Mars will be one who spills blood. Rav Ashi said: He will be either a blood letter, or a thief, or a slaughterer of animals, or a circumciser. Rabba said: I was born under the influence of Mars and I do not perform any of those activities. Abaye said: My Master also punishes and kills as a judge.

It was stated that Rabbi Ḥanina says: A constellation makes one wise and a constellation makes one wealthy, and there is a constellation for the Jewish people that influences them. Rabbi Yoḥanan said: There is no constellation for the Jewish people that influences them. The Jewish people are not subject to the influence of astrology. And Rabbi Yoḥanan follows his own reasoning, as Rabbi Yoḥanan said: From where is it derived that there is no constellation for the Jewish people? As it is stated: “Thus said the Lord: Learn not the way of the nations, and be not dismayed at the signs of heaven; for the nations are dismayed at them” (Jeremiah 10:2). The nations will be dismayed by them, but not the Jewish people.

And Rav also holds that there is no constellation for the Jewish people, as Rav Yehuda said that Rav said: From where is it derived that there is no constellation for the Jewish people? As it is stated with regard to Abraham: “And He brought him outside, and said: Look now toward heaven, and count the stars, if you are able to count them; and He said unto him: So shall your offspring be” (Genesis 15:5). The Sages derived from this that Abraham said before the Holy One, Blessed be He: Master of the Universe, “Behold, You have given me no offspring, and one born in my house is to be my heir” (Genesis 15:3). The Holy One, Blessed be He, said to him: No. “And, behold, the word of the Lord came to him, saying: This man shall not be your heir; rather, one that will come forth from your own innards shall be your heir” (Genesis 15:4).

(9) When you enter the land that the LORD your God is giving you, you shall not learn to imitate the abhorrent practices of those nations.(10) Let no one be found among you who consigns his son or daughter to the fire, or who is an augur, a soothsayer, a diviner, a sorcerer,(11) one who casts spells, or one who consults ghosts or familiar spirits, or one who inquires of the dead.(12) For anyone who does such things is abhorrent to the LORD, and it is because of these abhorrent things that the LORD your God is dispossessing them before you.

Maimonides (12th cent., Morocco and Egypt)

Who is a soothsayer? They that point at times, saying astrologically: "That day is a good one, that day is a bad one; that day is fit to do that particular work, but that year, or that month, is bad for that particular thing.¹¹Ibid. G.

All the above matters are falsehood and lies with which the original idolaters deceived the gentile nations in order to lead them after them. It is not fitting for the Jews who are wise sages to be drawn into such emptiness, nor to consider that they have any value ...

1. That one should not perform sorcery, soothsaying, or divination.

One should not consult with stargazers or those who cast lots. Rema: Because as it says you shall be simple with the Lord your God. And all the more so it is forbidden to consult with magicians, diviners, and sorcerers.

2. We have the custom not to begin something on Monday or Wednesday and women only marry when the moon is waxing (the first half of the month). Rema: And we also have the practice to begin studying on Rosh Chodesh, because even though it is not divination, there is a sign. What a person knows is against the stars he will not do, and we do not rely upon miracles. Rather, we don't deeply investigate this (astrology) because of "you shall be simple," as was explained.

§ The mishna teaches that from when the month of Av begins, one decreases acts of rejoicing. Rav Yehuda, son of Rav Shmuel bar Sheilat, said in the name of Rav: Just as when Av begins one decreases rejoicing, so too when the month of Adar begins, one increases rejoicing.

Rav Pappa said: Therefore, in the case of a Jew who has litigation with a gentile, let him avoid him in the month of Av, when the Jews’ fortune is bad, and he should make himself available in Adar, when his fortune is good.

Rabba bar bar Ḥana said that Rabbi Shmuel bar Marta said that Rav said, citing Rabbi Yosei of Hutzal: From where is it derived that one may not consult astrologers? As it is stated: “You shall be wholehearted with the Lord your God” (Deuteronomy 18:13). The Torah demands absolute faith in God and acceptance of His justice, without attempting to predict the future.