What is Satan in the Bible? From the accuser of the book of Job to the proper name

Satan, in the Bible, does not begin as a proper name: he begins as an office. The Hebrew term śāṭān means «accuser» or «adversary» and, in the oldest texts, always appears with the article, haśśāṭān, «the accuser» – it designates a function within the heavenly council, not the biography of an individual. Only later does the word settle into a name.

The shift from office to proper name is documented and can even be dated to a single text. The Episcopal Pastoral Commission for the Doctrine of the Faith of the National Conference of Bishops of Brazil, in the document «Exorcisms: theological reflections and pastoral guidelines», sums up the course this way: «Originally the expression used was “the satan”, with the article “the”, designating not a name but a charge: “the accuser”. Only gradually did this word come to be used as a proper name, without the article. The first text with that use is 1Chr 21,1». This article follows that road with the works of the Locus library, from Hebrew legal vocabulary to the Book of Revelation.

What does the word satan mean in the Hebrew Bible?

The starting point is courtroom vocabulary. The study «Satan in the Old Testament and Jewish horizon», in the Locus library, places the term in the semantic field of the verb to oppose and to accuse, and records a plainly forensic use in the Psalter: «Appoint a wicked man against him, and let an accuser (śāṭān) stand at his right hand» (Ps 109,6). The accuser here is a procedural role, the one who stands at the right of the defendant to incriminate him.

Hence the more exact formulation the same study proposes: «in the Old Testament, Satan is a mere function, not a biography». The observation is decisive for anyone looking in the Old Testament for a history of the devil. It is not there with the features later imagination gave it.

Who was satan in the book of Job?

In the book of Job, haśśāṭān appears within the heavenly council, questioning the uprightness of the just man and asking permission to put him to the test (Job 1,6-12 and 2,1-7). The study «Satan in the Old Testament and Jewish horizon» insists on the limit: he is an authorised and limited accuser who acts only within clear permissions (Job 1,12 and 2,6). The same pattern, the text notes, returns in Zechariah, where haśśāṭān accuses the high priest Joshua and the Lord rebukes him (Zech 3,1-2).

The National Conference of Bishops of Brazil describes the character’s logic in Job in the same terms – the accuser does not believe that a human being, faced with disaster, is capable of acknowledging the greatness of God, and for that reason God permits the trial. The liturgical commentary «DIOS CADA DÍA», by Marcel Bastin, Ghislain Pinckers and Michel Teheux, reads the book as a trial with three characters: God, «Satan», the Accuser, who sows division between God and man by telling God «men will forget you» and telling man «God has forgotten you», and Job, who without suspecting it becomes the arbiter of the debate.

When does satan become a proper name?

The turn, according to the National Conference of Bishops of Brazil, occurs at 1Chr 21,1, the first text in which the word is used without the article, as a name. The same document also points to the Book of Wisdom, which links the entry of death into the world to the envy of the devil (Wis 2,24). It is in that arc – Job, Zechariah, Chronicles, Wisdom – that a function of accusation gradually becomes a recognisable figure. On the angelic world in which the accuser stands, see the hierarchy of angels according to the Bible.

Did the satan of the Old Testament come from Persia? Here the sources diverge

Here the works of the library do not say the same thing, and the divergence deserves to be flagged rather than smoothed over. The National Conference of Bishops of Brazil allows a hypothesis of outside influence: the idea of satan as a personal enemy of God would have been «possibly influenced by conceptions of the surrounding peoples, from the Babylonians to the Persians and Greek religion», with Zoroastrianism singled out from the year 500 BC onward.

The study «Satan in the Old Testament and Jewish horizon» explains the same phenomenon from within: the function gradually stabilises into a more personalised figure, above all in Second Temple literature. The two readings are not necessarily exclusive, but the reader should know that the first is offered as a hypothesis («possibly», «may have been») and the second as the description of a documented literary process. The methodological rule the same study formulates holds for both: do not automatically read the Satan of the Christian imagination back into the ancient texts.

What does Jesus say about satan in the Gospels?

In the New Testament the name is already fixed, and it is Jesus who supplies the decisive argument. In Mark 3,20-35, accused of casting out demons by the prince of demons, he answers with a question which the commentary «Lectio divina for daily life: the Gospel of Mark», by Giorgio Zevini and Pier Giordano Cabra, cites thus: «¿Cómo puede Satanás expulsar a Satanás?», that is, «how can Satan cast out Satan?». There follows the principle of the kingdom divided against itself, which cannot stand.

The study «Demonology in the Parable of the Sower», also from the library, adds a piece of Jewish background: the figure of the birds devouring the seed (Mk 4,4) is echoed in the Book of Jubilees, where Mastema, the accuser or adversary, acts through birds that lay waste the sown fields (Jub 11,10-24). The action attributed to Satan in Mk 4,15 is, in that horizon, that of snatching the Word away before it takes root.

How does the Bible narrate the fall of satan?

Two texts concentrate the question. Anne Bernet, in «In the company of the angels: the true history of God’s messengers» (1998), cites them side by side: the word of Jesus in Luke 10,18, «I saw Satan fall from Heaven like lightning», and the Book of Revelation, «That great dragon was cast down, that ancient serpent, who is called the Devil and Satan, who seduces the whole world, he was cast down to the earth; and his angels were cast down with him» (Rev 12,9). The same author refers the scholastic discussion to the Summa Theologiae of Saint Thomas Aquinas, I, q. 109, a. 4.

One frequent confusion should be cleared up here: the name lucifer does not appear in those texts. The National Conference of Bishops of Brazil explains that it took hold because of Saint Jerome’s commentaries on the book of Isaiah and his Vulgate translation, from Is 14,12, and that the Latin term means «light-bearer». The same document concludes that «devils and demons do not appear in the biblical texts in an identical and univocal way». On the fate of those who fell, see also the fallen angels and the synthesis of the Catechism on angels and demons.

Does satan exist? The modern objection and what the sources answer

The question is not new. Marcelo Gomes Bolshaw, in «The problem of the theme of angels and demons today» (2018), recalls that authors such as Friedrich Schleiermacher and Adolf von Harnack rejected the idea of Satan as a personal being, ascribing it to ancient cultural influences. And he quotes the letter in which von Harnack admits it plainly: «As for your question about the devil, there is no doubt that the Scriptures intend to speak of a personal devil. But must the Bible have the last word, is it infallible? You know that this is not my opinion» (A. von Zahn-A. Harnack, A. Harnack, Berlin, 1951, pp. 211-212).

The remark is instructive: even one who denies the personal existence of the adversary acknowledges that the biblical text speaks of him as a person. The conclusion Bolshaw draws is methodological – «it is necessary to return to the biblical texts with a correct exegesis and to study how the Christian tradition, both Catholic and Protestant, interpreted them through the centuries». That is exactly what separates theological reading from curiosity: the point is not to decide whether the figure is congenial, but to read what is written and how it was read.

One last precision, because the questions are often confused. Knowing what Satan is in the Bible is not the same as knowing how the adversary acts upon a particular person. On that, see the difference between demonic possession and obsession.

Frequently asked questions

What does the word satan mean?

It means accuser or adversary. The Hebrew term śāṭān has a forensic sense, of one who accuses in a court, and in the oldest texts it appears with the article, haśśāṭān, «the accuser», designating a function and not a name.

What is the origin of the word satan in the Bible?

The origin is the legal vocabulary of the Old Testament. Psalm 109,6 uses śāṭān for the accuser standing at the defendant’s right hand. According to the National Conference of Bishops of Brazil, only gradually did the word come to be used as a proper name, without the article, and the first text with that use is 1Chr 21,1.

Does satan appear in the Old Testament?

He does, but almost always as a function within the heavenly council. He is in Job 1,6-12 and 2,1-7, in Zechariah 3,1-2, where he accuses the high priest Joshua, and in Psalm 109,6. In Job he acts only within the permissions he receives (Job 1,12 and 2,6).

How does the Bible narrate the fall of satan?

Luke 10,18 gives the word of Jesus, «I saw Satan fall from Heaven like lightning», and Revelation 12,9 speaks of the dragon cast down with his angels. The name lucifer does not come from those texts but from Saint Jerome’s translation of Isaiah 14,12, as the Brazilian bishops’ document on exorcisms recalls.

Does satan exist in the Bible, or is he a cultural figure?

Scripture speaks of a personal adversary. Theologians such as Schleiermacher and von Harnack rejected that reading, ascribing it to ancient cultural influences, and von Harnack himself acknowledged in a letter that «the Scriptures intend to speak of a personal devil», while denying their infallibility.