The English word “angel” refers to nonhuman spirits, usually good. The biblical words usually translated “angel” (Heb. malak; Gk. angelos) mean “messenger” and can refer to one sent by God or by human beings. A messenger must be utterly loyal, reliable, and able to act confidentially (Prov. 13:17). The messenger speaks and acts in the name of the sender (Gen. 24).

Messengers sent by God are not always angels. Yahweh’s prophets were his messengers (Hag. 1:13), as were priests (Mal. 2:7).

Old Testament

There are few references to angels (plural) in the OT. In heaven they praise God and worship him (Pss. 103:20; 148:2). God sends his angels to accompany his people (Gen. 28:12; 32:1) and to protect them (Ps. 91:11) and once sent them to destroy Egypt (Ps. 78:49).

An angel in human form was referred to as a “man of God” (Judg. 13:6), the same term used for a prophet (cf. 1 Kings 13:14).

Angels evoked fear and wonder. They are described as shining (Matt. 28:3; Acts 12:7). When humans bowed to worship angels, they were rebuked because God alone is to be worshiped (Rev. 22:8–9).

God himself, not being a part of the created order, cannot be seen. In order to communicate with people, he sometimes speaks through a form called “the angel of the Lord.” The angel of the Lord appeared to Abraham in human form (Gen. 18; cf. Josh. 5:13–15), but to Moses as fire (Exod. 3:2). When he spoke, it was God speaking (Exod. 3:4, 14). He guided and guarded Israel out of Egypt and through the desert (23:20–23). He appeared within the pillar of fire or cloud (13:21–22; 14:19), being seen through the pillar on occasion as “the glory of the Lord” (16:7–10; 24:16–17; 33:9–11; 40:17, 34–38), and later as he filled Solomon’s temple (1 Kings 8:11).

In a series of visions of the glory of the Lord (Ps. 18:7–15; Ezek. 1; Rev. 4:7) we encounter four “living creatures” called “cherubim” (Ezek. 10:20–22) that are not explicitly identified as angels and whose visible appearance is part human and part animal. Their form was placed on the cover of the Ark of the Covenant (Exod. 25:18) and embroidered on the curtains of the tabernacle (26:1). Cherubim guarded the eastern entry into the garden of Eden (Gen. 3:24), implying that Eden, the place where God appeared on earth, was now excluded from the area allocated to humankind.

In Isaiah’s vision of God’s glory, he describes, literally, “flaming ones” (Heb. seraphim) located above God and crying, “Holy, holy, holy” (Isa. 6:1–7). All we know of them is that they had six wings, whereas the cherubim had four (Ezek. 1:11). It may be that seraphim are not a separate class of angels but simply a description appropriate to all angels, since elsewhere we are told (Ps. 104:4; Heb. 1:7) that God’s angels are “flames of fire.”

Angels are also called “holy ones” (Deut. 33:2) and “spirits” or “winds” (Zech. 6:5; cf. Ps. 104:4). Since God’s people are also called “holy ones” (Dan. 7:27; NIV: “holy people”), it may be difficult to know if a given reference is to angels or people (e.g., Deut. 33:3).

Angels are first named in the book of Daniel: Gabriel, whose name means “hero of God” (8:16; 9:21; [cf. Luke 1:19, 26]); Michael, whose name means “who is like God?” (10:13, 21; 12:1 [cf. Jude 9; Rev. 12:7]) and who is also called “one of the chief princes,” “your prince,” and “the great prince.” The Hebrew word for “prince” (sar) also means “commander” (e.g., 1 Sam. 17:55) and thus might refer to Michael’s standing as a commander of God’s angelic armies (cf. Jude 9, where he is called “archangel”). During the intertestamental period, texts outside the Scriptures tend to give more attention to angels in elaborate stories, introducing such names as Raphael and Uriel (see Tobit, 1 Enoch, etc.).

Intertestamental Period and New Testament

During the intertestamental period some Jews came to think that angels ranked higher than humans, since the Greeks asserted that anything physical was evil and only purely spiritual beings could be holy. Increasingly detailed stories about angels served to distance God from the evils of physical reality. The myth of the fall of the angels arose during this time through a series of writings claiming to come from the pen of Enoch (1 Enoch), stimulating a large number of other writings. Some people even went so far as to worship angels (Col. 2:18).

Some references to angels are difficult to understand. In Matt. 18:10 Jesus warns people to treat children well because their angels have constant access to God. The simplest meaning is that angelic messengers will tell God what has happened with these children. Rhoda’s reference to Peter’s “angel” as if it were his ghost probably reflects a local superstition (Acts 12:15) or a sectarian Jewish belief that the righteous become angels when they die. Paul’s comment that a woman should have “authority over her own head” (i.e., her head covered) “because of the angels” (1 Cor. 11:10) remains something of a puzzle, and his unique reference to the language of angels appears to be hyperbole (1 Cor. 13:1).

Paul warns us that Satan can appear as “an angel of light,” meaning that he would work through one who claimed to bring a message in accord with the gospel (2 Cor. 11:14). The devil has his “angels/messengers” (Matt. 25:41), although we know little about them.

Angels do not marry, reproduce, or die (Matt. 22:30; Mark 12:25; Luke 20:35–36). The NT affirms that angels rank below God’s people and serve them (1 Cor. 6:3; Heb.1:4–14; 2:5, 16), as they did Jesus (Matt. 4:11; Mark 1:13; cf. 1 Kings 19:5–7; Luke 22:43). Angels have limited understanding or knowledge of God’s plans and purposes (1 Pet. 1:12), although they reveal God’s word (Rev. 1:1). They bring the spirits of God’s people to heaven when they die (Luke 16:22) and implement God’s judgment on the last day (Matt. 13:39, 49; 16:27; 24:31; 25:31; Mark 8:38; 13:27; Luke 9:26; 2 Thess. 1:7; Rev. 14:15–19). They rejoice when a sinner repents (Luke 15:10). Christians already stand in the greater assembly that includes the angels (Heb.12:22). Eventually, Jesus will welcome his people into the heavenly courtroom in the presence of the angels (Luke 12:8–9; Rev. 3:5). See also Archangel.