Astrology
Astrology in scripture is the practice of reading the stars and the heavenly bodies for fortune, fate, and counsel. The UPDV gives it a small but unmistakable footprint: a handful of named verses that taunt or warn against it, a Babylonian court class — the Chaldeans and the astrologers — that names it as a profession, and a counter-witness in the heavens themselves, made and numbered by God for ordinary use as lights and signs of his glory rather than as oracles.
Stars Made, Numbered, and Named
The opening note of the UPDV is that the heavenly bodies are made things. "And [the Speech of] God made the two great lights; the greater light to rule the day, and the lesser light to rule the night and the stars" (Gen 1:16). They keep the place assigned to them: "When I consider your heavens, the work of your fingers, The moon and the stars, which you have appointed" (Ps 8:3). They are counted and called: "He counts the number of the stars; He calls them all by [their] names" (Ps 147:4). At the founding of the world they were a chorus, not an oracle — "When the morning stars sang together, And all the sons of God shouted for joy?" (Job 38:7). Sirach takes the same line: "The beauty of heaven, and its glory [are] the stars, With their bright shining in the heights of God" (Sir 43:9), "At the word of God they stand as decreed, And they do not sleep in their watches" (Sir 43:10). Once, in the Song of Deborah, the stars appear as Yahweh's instruments in battle — "From heaven fought the stars, From their courses they fought against Sisera" (Jdg 5:20) — but the verse keeps the stars under God's command, not the other way around. Paul speaks of differing brightness — "There is one glory of the sun, and another glory of the moon, and another glory of the stars; for one star differs from another star in glory" (1 Cor 15:41) — and the New Testament's last word identifies a single morning star with a person: "I am the root and the offspring of David, the bright, the morning star" (Rev 22:16).
Don't Learn the Way of the Nations
The prophetic warnings come at astrology from two sides. From Jeremiah, the address is to Israel directly: "Hear⁺ the word which Yahweh speaks to you⁺, O house of Israel: thus says Yahweh, Don't learn the way of the nations, and don't be dismayed at the signs of heaven; for the nations are dismayed at them" (Jer 10:1-2). The signs are real to the nations who fear them; the people of Yahweh are told not to be among them. From Isaiah, the address is to Babylon herself, and the tone is mockery: "You are wearied in the multitude of your counsels: let the astrologers stand up now and save you, those observing the stars for determining your horoscopes" (Isa 47:13). The footnote glosses "horoscopes" with the literal phrase, "in the new moons what will happen to you." The same chapter has Babylon failing in spite of her arts — "the loss of children, and widowhood; in their full measure they will come upon you, in the multitude of your witchcraft, and the great abundance of your magic words" (Isa 47:9).
The Babylonian Court Class
Daniel makes astrology concrete by naming the professional class that practiced it. They appear, and they fail. Nebuchadnezzar summons "the sacred scholars, and the psychics, and the sorcerers, and the Chaldeans, to tell the king his dreams" (Dan 2:2). They cannot. Daniel's reply states the limit plainly: "The secret which the king has demanded can neither wise men, psychics, sacred scholars, nor astrologers, show to the king" (Dan 2:27). The next call goes the same way: "Then the sacred scholars, the psychics, the Chaldeans, and the astrologers came in; and I told the dream before them; but they did not make known to me its interpretation" (Dan 4:7). At Belshazzar's feast it is the same roster, summoned by the same king's-reward formula: "The king cried aloud to bring in the psychics, the Chaldeans, and the astrologers. The king spoke and said to the wise men of Babylon, Whoever will read this writing, and show me its interpretation, will be clothed with purple, and have a chain of gold about his neck, and will be the third ruler in the kingdom" (Dan 5:7). The footnote on Dan 1:20 — where the king found the four young Hebrews "ten times better than all the sacred scholars and psychics who were in all his realm" — defines the Babylonian "psychics" as those used "in the general sense of one who interprets signs, communicates with spirits, and other does other rituals to determine one's fate." That is the working definition of astrology's neighborhood in the UPDV.
Daniel's Counter-Witness
The same chapters set Daniel against this class. He and his three colleagues are placed inside the king's training program (Dan 1:6); he separates himself from its defilements (Dan 1:8); when the wise men's failure becomes a death sentence, he intervenes "with counsel and prudence" (Dan 2:14) and asks his colleagues to seek "mercies of the God of heaven concerning this secret; that Daniel and his colleagues should not perish with the rest of the wise men of Babylon" (Dan 2:18). At Belshazzar's feast he refuses the king's reward — "Let your gifts be to yourself, and give your rewards to another; nevertheless I will read the writing to the king, and make known to him the interpretation" (Dan 5:17) — and locates the king's offense not in misreading signs but in praising "the gods of silver and gold, of bronze, iron, wood, and stone, which don't see, nor hear, nor know; and the God in whose hand is your breath, and are all your ways, you have not glorified" (Dan 5:23). The contrast is consistent: the astrologers are summoned, paid, and beaten by a man who asks the God of heaven instead.
Astrology Among the Forbidden Arts
Astrology is not isolated in the UPDV; it sits in a wider catalog of arts the Mosaic law refuses. The base prohibition is comprehensive: "There will not be found with you anyone who makes his son or his daughter to pass through the fire, one who tells the future, one observing for omens, or an interpreter of birds, or a sorcerer, or one casting spells, or one requesting a spirit, or a wizard, or one inquiring of the dead" (Deut 18:10-11). The reason given turns on Yahweh's grant: "For these nations that you will dispossess, listen to psychics and fortune-tellers; but as for you, Yahweh your God has not allowed you to do so" (Deut 18:14). The wisdom-line in Sirach reaches the same verdict by a different route: "Divinations, and soothsayings, and dreams are vain, As you hope so does your heart see" (Sir 34:5) — the practitioner reads back the heart's wish. Zechariah issues the same indictment with the cost it leaves: "For the talismans have spoken vanity, and the fortune-tellers have seen a lie; and they have told false dreams, they comfort in vain: therefore they go their way like sheep, they are afflicted, because there is no shepherd" (Zec 10:2). Jeremiah, addressing the exiles, names the same crowd in the Babylonian setting: "But as for you⁺, don't listen to your⁺ prophets, or to your⁺ fortune-tellers, or to your⁺ dreamers, or to your⁺ psychics, or to your⁺ sorcerers, who speak to you⁺, saying, You⁺ will not serve the king of Babylon" (Jer 27:9). And Malachi seals the prophets' line: "And I will come near to you⁺ to judgment; and [my Speech] will be a swift witness against the sorcerers" (Mal 3:5).
A Note on Vocabulary
The UPDV uses a specific cluster of English words for the people who practice astrology and its neighbor arts. "Astrologers" is reserved for the named profession in Isaiah and Daniel. "Chaldeans" in Daniel functions as a class-name for that same Babylonian guild — "the sacred scholars, the psychics, the Chaldeans, and the astrologers" (Dan 4:7) — alongside its older ethnic use elsewhere. "Sacred scholars" stands for the priestly literati who handle dreams and signs (Gen 41:24; Exod 7:11; Dan 1:20; the footnote at Dan 1:20 cross-references Gen 41:8). "Psychics" stands for diviners who, per the Daniel footnote, interpret signs, contact spirits, and run other fate-determining rites. The reader who keeps these words in view will see that the UPDV does not treat astrology as a free-standing topic with its own theology; it treats it as one item in a set of practices the law refuses, the prophets mock, and Daniel out-performs by asking the God of heaven instead.