In the world of the Bible, a person was viewed as a unity of being with the pervading breath and thus imprint of the loving and holy God. The divine-human relationship consequently is portrayed in the Bible as predominantly spiritual in nature. God is spirit, and humankind may communicate with him in the spiritual realm. The ancients believed in an invisible world of spirits that held most, if not all, reasons for natural events and human actions in the visible world.

Old Testament

The OT writers used the common Hebrew word ruakh (“wind” or “breath”) to describe force and even life from the God of the universe. In its most revealing first instance, God’s ruakh hovered above the waters of the uncreated world (Gen. 1:2). In the next chapter of Genesis a companion word, neshamah (“breath”) is used as God breathed into Adam’s nostrils “the breath of life” (2:7). God thus breathed his own image into the first human being. Humankind’s moral obligations in the remainder of the Bible rest on this breathing act of God.

The OT authors often employ ruakh simply to denote air in motion or breath from a person’s mouth. However, special instances of the use of ruakh include references to the very life of a person (Gen. 7:22; Ps. 104:29), an attitude or emotion (Gen. 41:8; Num. 14:24; Ps. 77:3), the negative traits of pride or temper (Ps. 76:12), a generally good disposition (Prov. 11:13; 18:14), the seat of conversion (Ezek. 18:31; 36:26), and determination given by God (2 Chron. 36:22; Hag. 1:14).

On occasion in the OT, spirits are labeled “evil” (Judg. 9:23 ESV, NRSV, NASB). In the case of an evil spirit tormenting King Saul, the spirit was identified as “from the Lord” (1 Sam. 16:14–15, 23). According to the perspective of the ancients, once a person was possessed by a divine spirit, departure of such a spirit meant possession by a different spirit (1 Sam. 16:14). Such a perspective was common in the ancient Near Eastern and Mediterranean worlds and stemmed from the religious fervor of Semitic nomads.

New Testament

The NT authors used the Greek term pneuma to convey the concept of spirit. In the world of the NT, the human spirit was understood as the divine part of human reality as distinct from the material realm. The spirit appears conscious and capable of rejoicing (Luke 1:47). Jesus was described by Luke as growing and becoming “strong in spirit” (1:80). In “spirit” Jesus “knew” what certain teachers of the law were thinking in their hearts (Mark 2:8). Likewise, Jesus “was deeply moved in spirit and troubled” at the sickness of a loved one (John 11:33). At the end of his life, Jesus gave up his spirit (John 19:30).

According to Jesus, the spirit is the place of God’s new covenant work of conversion and worship (John 3:5; 4:24). He declared the human spirit’s dependence on God and ascribed great virtue to those people who were “poor in spirit” (Matt. 5:3).

Human beings who were possessed by an evil spirit were devalued in Mediterranean society. In various places in the Synoptic Gospels and the book of Acts, either Jesus or the disciples were involved in exorcisms of such spirits (Matt. 8:28–33; Mark 1:21–28; 7:24–30; 9:14–29; 5:1–20; 9:17–29; Luke 8:26–33; 9:37–42; Acts 5:16).

The apostle Paul pointed to the spirit as the seat of conversion (Rom. 7:6; 1 Cor. 5:5). He described believers as facing a struggle between flesh and spirit in regard to living a sanctified life (Rom. 8:2–17; Gal. 5:16–17). A contradiction seems apparent in Pauline thinking as he appears to embrace Greek dualistic understanding of body (flesh) and spirit while likewise commanding that “spirit, soul and body be kept blameless” (1 Thess. 5:23). However, the Christian struggle between flesh and Spirit (the Holy Spirit) centers around the believer’s body being dead because of sin but the spirit being alive because of the crucified and resurrected Christ (Rom. 8:10). Believers therefore are encouraged to lead a holistic life, lived in the Spirit.

Holy Spirit

God’s Spirit is described in the opening chapters of Genesis as partaking in creation. His Spirit likewise is seen throughout the OT as an agent in establishing God’s people as a nation and a people of his own. Leaders of Israel were chosen and possessed by the Spirit to assist in leading the people into God’s will (Deut. 34:9; Judg. 6:34; 15:14; 1 Sam. 11:6; 16:23). Typically, the moment the Spirit of God descended on a leader, miraculous fortitude, wisdom, and power resulted. The Spirit also provided whatever was needed for God’s prophets—courage, inspiration, and miracles (Num. 11:25; 1 Sam. 10:10; Isa. 11:2; Ezek. 2:2; Dan. 4:8; Joel 2:28). The office of prophet included prophesying both in the king’s court and among the people of the land. As the Spirit came on a prophet of God, the prophet would correct the king’s and others’ behavior and at times foretell the future or the outcome of possible decisions.

In the Synoptic Gospels, the Holy Spirit functions in much the same way as in the OT. One such function appears in Luke’s birth narrative when the angel answers Mary’s question as to how she might conceive while a virgin (Luke 1:34): “The Holy Spirit will come on you, and the power of the Most High will overshadow you” (1:35). The Greek verb translated “will overshadow you” is used in the LXX to describe God’s protective nature (Pss. 91:4; 140:7). Likewise, the coming of God’s Spirit presented empowerment (Acts 1:8). Thus, Mary received both divine empowerment and protection. As the birth narrative continues, Luke records how other characters in the story, Elizabeth and Zechariah, were filled with the Spirit when Mary came to visit while pregnant with Jesus and when John the Baptist, the forerunner of the Messiah, was born (1:41, 67). The evangelists record the Spirit descending on Jesus at the time of his baptism (Matt. 3:16; Mark 1:10; Luke 3:22; John 1:32–34) and describe him as full of the Spirit when he was led by the Spirit into the desert (Luke 4:1). Finally, in John’s Gospel the Spirit is the promised comforter whom Jesus will give to his followers. He will testify about Christ (John 15:26).

In the new covenant the Spirit-possession of the OT gave way to believers’ reception of the Spirit at conversion. In Acts the Holy Spirit is presented as instrumental in carrying out the mission of the church, providing power and signs as well as moving and motivating missionaries. The apostle Paul attributes to the Holy Spirit the function of imbuing believers and the church with an assortment of virtues (Gal. 5:22), gifts (Rom. 12:7–8; 1 Cor. 12:1–11), and ministers (Eph. 4:7–13). He uses the idea of life in the Spirit as a point of contrast with life in the flesh. In John’s letters the Spirit is described as providing discernment of truth (1 John 4:6). See also Holy Spirit.