Is Astrology A Sin? Can Christians Believe in Zodiac Signs?

Yes. Scripture forbids divination and the worship of the stars, and the Catholic and Orthodox churches and the Protestant Reformers all condemn astrology used to foretell events or explain character. The Catechism names horoscopes and astrology among the practices to be rejected (2116). Studying the stars as God’s creation, as astronomy does, is not forbidden.

Are the zodiac signs in the Bible?

Not by name. The Bible never lists the twelve signs, but two Hebrew words may refer to the zodiac or to constellations. When King Josiah reformed worship in Judah, he removed the priests who “burned incense to Baal, to the sun and the moon and the constellations and all the host of the heavens” (2 Kings 23:5). The word translated “constellations” (the King James Version has “planets”) is mazzalot. The Hebrew lexicon of Brown, Driver and Briggs defines it as “constellations, perhaps signs of the zodiac,” probably borrowed from an Assyrian word meaning “station.” In later Hebrew, mazzal meant a star of fortune or fate, and the word survives in the Yiddish greeting mazel tov, “good fortune.” In 2 Kings the mazzalot are objects of worship, and Josiah puts an end to it.

The second word comes in God’s questions to Job: “Can you bind the chains of the Pleiades or loose the cords of Orion? Can you lead forth the Mazzaroth in their season, or can you guide the Bear with its children?” (Job 38:31–32). No one knows exactly what Mazzaroth means. The English Standard Version notes that it is “probably the name of a constellation,” and Brown, Driver and Briggs take it as probably another form of mazzalot. Here, as in Job 9:9 and Amos 5:8, the constellations are works that God made and rules.

What does the Bible say about astrology?

The law of Moses forbids both worshiping the stars and reading the future from signs. “Beware lest you raise your eyes to heaven, and when you see the sun and the moon and the stars, all the host of heaven, you be drawn away and bow down to them and serve them” (Deuteronomy 4:19). “There shall not be found among you anyone who … practices divination or tells fortunes or interprets omens, or a sorcerer or a charmer or a medium or a necromancer or one who inquires of the dead, for whoever does these things is an abomination to the Lord” (Deuteronomy 18:10–12).

The prophets mock the astrologers of Babylon. Isaiah tells the city to call on “those who divide the heavens, who gaze at the stars, who at the new moons make known what shall come upon you,” and says that “the fire consumes them; they cannot deliver themselves from the power of the flame” (Isaiah 47:13–14). Jeremiah writes: “Learn not the way of the nations, nor be dismayed at the signs of the heavens because the nations are dismayed at them” (Jeremiah 10:2). When Nebuchadnezzar demanded to know his dream, Daniel told him that no “wise men, enchanters, magicians, or astrologers” could reveal it, “but there is a God in heaven who reveals mysteries” (Daniel 2:27–28). In Acts, Paul drives a spirit of divination out of a slave girl who “brought her owners much gain by fortune-telling” (Acts 16:16–18).

Scripture does call the lights of heaven signs. At creation God says, “Let them be for signs and for seasons, and for days and years” (Genesis 1:14), and the psalmist sings, “The heavens declare the glory of God” (Psalm 19:1). In these passages the sun, moon and stars mark time and point to their maker; they do not decide what happens to people. Astrologers in Calvin’s day appealed to Genesis 1 and to Jeremiah, and Calvin answered them from Isaiah 44:25, where God “frustrates the signs of liars and makes fools of diviners.”

Were the wise men astrologers?

Matthew calls them magoi, magi, “from the east,” who came to Jerusalem saying, “We saw his star when it rose and have come to worship him” (Matthew 2:1–2). The word comes from the Old Persian name for a class of priests known in the ancient world for their study of the stars, and some translations, such as the New English Bible and J. B. Phillips, call them astrologers. The star Matthew describes did something no star does: it “went before them until it came to rest over the place where the child was” (Matthew 2:9).

Christian writers have read the story as the end of astrology rather than an approval of it. Pope Benedict XVI, in his 2007 encyclical Spe Salvi, cites Gregory of Nazianzus, who said “that at the very moment when the Magi, guided by the star, adored Christ the new king, astrology came to an end, because the stars were now moving in the orbit determined by Christ” (Spe Salvi 5).

Catholic teaching

The Catechism of the Catholic Church treats astrology under the first commandment. It grants that “God can reveal the future to his prophets or to other saints,” but says that “a sound Christian attitude consists in putting oneself confidently into the hands of Providence for whatever concerns the future, and giving up all unhealthy curiosity about it” (2115). It continues: “All forms of divination are to be rejected… Consulting horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums all conceal a desire for power over time, history, and, in the last analysis, other human beings, as well as a wish to conciliate hidden powers. They contradict the honor, respect, and loving fear that we owe to God alone” (2116). The next paragraph condemns magic and the wearing of charms (2117).

The teaching is old. Augustine consulted astrologers as a young man and later wrote that their art is one “which Christian and true piety fitly rejects and condemns.” His objection was that astrology takes away responsibility: its practitioners say, “The cause of your sin is inevitably determined in heaven; and, This did Venus, or Saturn, or Mars” (Confessions 4.3). In The City of God (book 5) he asks why twins born moments apart, such as Esau and Jacob, lead such different lives. Thomas Aquinas allowed that the heavens affect the body and the weather, so that forecasting an eclipse or a drought is lawful, but held that they cannot act directly on the intellect and will. Using the stars “to know with certitude future human actions” is, he wrote, “a superstitious and unlawful divination” (Summa Theologiae II-II, question 95, article 5).

Orthodox teaching

The early councils of the East legislated against it. Canon 36 of the Council of Laodicea, in the fourth century, ruled that clergy “shall not be magicians, enchanters, mathematicians, or astrologers,” and that those who wear amulets are to be “cast out of the Church.” Canon 61 of the Council in Trullo (692) imposed six years of penance on those who consult soothsayers, and applied the same penalty to “those who tell fortunes and fates.” In 2011 the Orthodox Church in America answered a reader who said an astrological description matched their personality almost exactly. Its reply was that such descriptions are so general that “just about everyone would see himself or herself as fitting into what is described,” and it concluded: “There’s no truth in astrology. Stars do not control our destiny any more than rocks do.”

Protestant teaching

The Reformers rejected it. Martin Luther, in his Table Talk, used Augustine’s example: “Esau and Jacob were born together, of one father and one mother, at one time, and under equal planets, yet they were wholly of contrary natures, kinds, and minds. What is done by God, ought not to be ascribed to the stars.” John Calvin published a Warning against So-Called Judicial Astrology in Geneva in 1549. The church historian Philip Schaff summarizes it: Calvin approved the study of the heavens but rejected astrology that “presumes to pronounce judgment upon a man’s character or destiny as written in the stars.” In 1988 the Southern Baptist Convention, in a resolution on the New Age movement, listed “endeavoring to reveal a person’s future through astrology, fortune telling, and palm reading” among its false hopes.

Is reading a horoscope for fun a sin?

Many Americans consult horoscopes, and most of them say it is for fun. In a Pew Research Center survey published in May 2025, 30% of American adults said they consult astrology, tarot cards or a fortune teller at least once a year; 20% said they do so mostly “just for fun,” and 10% because they find the practices give them helpful insights. Religiously affiliated Americans were as likely as the unaffiliated to say they believe the stars and planets affect people’s lives (27% and 28%).

The Catechism’s list makes no exception for casual use: it names “consulting horoscopes” itself. Psychologists have studied why such descriptions seem to fit. In 1948 the psychologist Bertram Forer gave 39 students what he said were personal descriptions based on a test; they rated them 4.3 out of 5 for accuracy, and every student had received the same text, assembled from a newsstand astrology book. The tendency to accept vague descriptions as personal is now called the Forer or Barnum effect.

What is the “Christian zodiac” or “gospel in the stars”?

It is the idea that God revealed the gospel to the first generations of humanity in the constellations, and that the twelve signs, read in order, tell the story of redemption. Frances Rolleston, a nineteenth-century English classicist and linguist, set it out in Mazzaroth; or, the Constellations (1863). Joseph Seiss, a Lutheran minister in Philadelphia, popularized it in America in The Gospel in the Stars (1882), and E. W. Bullinger, an Anglican clergyman, gave it its best-known form in The Witness of the Stars (1893). Bullinger begins with Virgo, the virgin, as “the promised seed of the woman,” and ends with Leo, the lion, as “Messiah’s consummated triumph.” He cites the Jewish historian Josephus, who says that the descendants of Seth studied the heavenly bodies and inscribed their discoveries on two pillars, one of brick and one of stone.

Its advocates offer it as a witness to Christ, not as fortune-telling. Critics, including the evangelical Christian Research Institute, reject it: no passage of Scripture teaches it, the meanings assigned to the signs are arbitrary, and the order does not follow Genesis, since Virgo, standing for the promised seed, comes before Libra, standing for sin, while in Genesis the promise follows the fall. Historians trace the twelve-sign zodiac to Babylonian astronomers, who divided the sun’s path into twelve equal signs around the end of the fifth century BC.

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