Satan & Demons

He who makes a practice of sinning is of the devil, for the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the works of the devil. — 1 John 3:8

The Biblical Vocabulary

Scripture uses several names and titles for the chief adversary:

satan (שָׂטָן) — from the Hebrew root s-t-n (שׂטן), meaning “to oppose, to accuse, to act as adversary”; used as a common noun (“an adversary,” e.g., 1 Samuel 29:4, Numbers 22:22) and as a proper name with the definite article hassatan (הַשָּׂטָן) — “the Adversary” (Job 1:6, Zechariah 3:1)
diabolos (διάβολος) — from dia (through) + ballo (to throw), literally “one who throws across,” hence “slanderer, false accuser”; the Septuagint renders satan as diabolos, from which we derive the English “devil”
nachash (נָחָשׁ) — “serpent” (Genesis 3:1); possibly related to nachash (נחשׁ, “to practice divination”) or nechoshet (נְחֹשֶׁת, “bronze, shining one”), the latter connecting to the serpent’s originally glorious appearance before the fall
Other titles — ho poneros (ὁ πονηρός) — “the evil one” (Matthew 13:19); ho peirazon (ὁ πειράζων) — “the tempter” (Matthew 4:3); ho archon tou kosmou (ὁ ἄρχων τοῦ κόσμου) — “the ruler of this world” (John 12:31); ho archon tes exousias tou aeros (ὁ ἄρχων τῆς ἐξουσίας τοῦ ἀέρος) — “the prince of the power of the air” (Ephesians 2:2); ho kategor (ὁ κατήγωρ) — “the accuser” (Revelation 12:10); Beelzeboul (Βεελζεβούλ) — likely from Hebrew Ba’al Zevuv (בַּעַל זְבוּב), “Lord of the Flies” (2 Kings 1:2), altered to Ba’al Zevul, “Lord of the Dwelling/Dung” (Matthew 12:24); and ho pater tou pseudous (ὁ πατὴρ τοῦ ψεύδους) — “the father of lies” (John 8:44)

Satan’s Origin

Satan is a created being, not an eternal counterpart to God. Christianity is not dualistic — there is no cosmic struggle between equal and opposite powers. God alone is sovereign and uncreated.

Two Old Testament passages have traditionally been read as describing Satan’s fall:

Isaiah 14:12-15 — Originally addressed to the king of Babylon, this passage names the fallen figure Helel ben Shachar (הֵילֵל בֶּן־שָׁחַר) — “Shining One, Son of the Dawn.” The Hebrew helel derives from h-l-l (הלל, “to shine, to boast”), and the Latin Vulgate rendered it Lucifer (“light-bearer”). The figure sought to ascend above the kokhevei ‘El (כּוֹכְבֵי אֵל) — “stars of God” — and make himself “like the Most High” (‘Elyon, עֶלְיוֹן), only to be cast down to She’ol (שְׁאוֹל), the realm of the dead
Ezekiel 28:12-19 — Addressed to the king of Tyre, it depicts a keruv mimshach hassokek (כְּרוּב מִמְשַׁח הַסּוֹכֵךְ) — an “anointed guardian cherub” — once in “Eden, the garden of God,” adorned with every precious stone, who was cast out for iniquity

Scholars debate whether these texts describe Satan directly or use mythological imagery to address human kings. Many Church Fathers and Reformers read them as revealing, through the historical kings, the deeper reality of Satan’s primordial rebellion. Jesus Himself said, “I saw Satan fall like lightning from heaven” (Luke 10:18), and Revelation 12:7-9 describes war in heaven resulting in the dragon’s expulsion.

Satan’s Character

Scripture paints a consistent portrait of Satan’s nature and methods:

Liar — He is pseustes (ψεύστης) — “a liar” — and the father of lies; there is no aletheia (ἀλήθεια, “truth”) in him (John 8:44)
Accuser — He stood at the right hand to accuse — the Hebrew verb satan (שָׂטַן) is used as a verb in Zechariah 3:1: lesitnoh (לְשִׂטְנוֹ), “to accuse him” (Revelation 12:10)
Tempter — He is ho peirazon (ὁ πειράζων), literally “the one testing/trying”; he enticed Eve with hishia’ (הִשִּׁיא, “deceived, beguiled,” from nasha’, נשא) in the garden and tempted Christ in the wilderness (Genesis 3:1–5; Matthew 4:1–11)
Deceiver — He metaschematizes (μετασχηματίζεται) — “disguises, transforms the outward appearance of” — himself as an angelos photos (ἄγγελος φωτός), “angel of light” (2 Corinthians 11:14)
Murderer — He was anthropoktonos (ἀνθρωποκτόνος) — “a man-killer, murderer” — ap’ arches (ἀπ’ ἀρχῆς), “from the beginning” (John 8:44)
Ruler of this world — He is ho theos tou aionos toutou (ὁ θεὸς τοῦ αἰῶνος τούτου) — “the god of this age” (2 Corinthians 4:4) — exercising a delegated, temporary authority over fallen creation (John 12:31, 1 John 5:19)

Demons — Unclean Spirits

Demons — daimonia (δαιμόνια) in Greek — are also called pneumata akatharta (πνεύματα ἀκάθαρτα) — “unclean spirits” — and pneumata ponera (πνεύματα πονηρά) — “evil spirits.” The Hebrew Old Testament uses shedim (שֵׁדִים) — “demons” (Deuteronomy 32:17, Psalm 106:37), possibly borrowed from Akkadian shedu (“protective spirit”), and se’irim (שְׂעִירִים) — literally “hairy ones, goat-demons” (Leviticus 17:7, 2 Chronicles 11:15, Isaiah 13:21). They appear frequently in Scripture, especially during Jesus’ earthly ministry. Their origin is not stated explicitly. The most common theological view identifies them as fallen angels who joined Satan’s rebellion (Matthew 25:41, Revelation 12:7-9). Some early Jewish traditions connected them with the Nefilim (נְפִלִים) — “fallen ones” — of Genesis 6, though this view has less support in mainstream Christian theology.

Demons are personal beings who:

Recognize and fear Jesus as the Son of God (Mark 1:24, James 2:19)
Afflict people physically, mentally, and spiritually (Matthew 12:22, Mark 5:1-20, Luke 13:11-16)
Promote false doctrine and idolatry (1 Timothy 4:1, 1 Corinthians 10:20)
Operate in organized hierarchies (Ephesians 6:12, Daniel 10:13)

Jesus demonstrated absolute authority over demons. He cast them out with a word, without rituals or incantations (Mark 1:25-27). He delegated this authority to His disciples (Luke 10:17-20) and to the Church (Mark 16:17).

Satan’s Defeat at the Cross

The New Testament proclaims that Christ’s death and resurrection constitute Satan’s decisive defeat — the fulfillment of the protoevangelium of Genesis 3:15, where God promised that the seed of the woman would crush the serpent’s head. The Christus Victor model of the atonement places this cosmic victory at the center of the cross’s meaning:

He disarmed the rulers and authorities and put them to open shame, by triumphing over them in him. — Colossians 2:15

Since therefore the children share in flesh and blood, he himself likewise partook of the same things, that through death he might destroy the one who has the power of death, that is, the devil. — Hebrews 2:14

The cross did not merely injure Satan — it apekdusamenos (ἀπεκδυσάμενος) — “stripped, disarmed” him (Colossians 2:15). This rare Greek compound verb (from apo + ekduo, “to strip off completely”) pictures a conqueror stripping armor from a vanquished foe. The archon tou kosmou toutou (ἄρχων τοῦ κόσμου τούτου) — “ruler of this world” — has been kekritai (κέκριται) — “judged, condemned” (John 16:11, perfect tense indicating a settled verdict). The accuser’s charges have been answered by Christ’s hilasmos (ἱλασμός) — “atoning sacrifice, propitiation” (1 John 2:2). Death, Satan’s ultimate weapon, has been swallowed up in nikos (νῖκος) — “victory” (1 Corinthians 15:54-57).

Satan’s Limited Power

Even before the cross, Satan’s power was never absolute. The book of Job makes this strikingly clear: Satan could not touch Job without divine permission, and even then only within the boundaries God set (Job 1:12, 2:6).

Key truths about Satan’s limitations:

He is a creature, not the Creator — finite in power, knowledge, and presence
He operates only within God’s sovereign permission (Luke 22:31-32)
He cannot separate believers from God’s love (Romans 8:38-39)
He has been judged and his final doom is certain (Revelation 20:10)
Greater is He who is in believers than he who is in the world (1 John 4:4)

The Christian need not live in fear of Satan. Sober vigilance, yes — but not terror. The enemy is real but defeated, active but restrained, dangerous but doomed. For how believers engage this defeated but still-active enemy, see the article on spiritual warfare.

“Submit yourselves therefore to God. Resist the devil, and he will flee from you.” — James 4:7