Baptism Baptism was an important element of the Christian faith from the very beginning (Acts 2:38). The words “baptism” and “baptize” were already used in Judaism to refer to a religious rite for cleansing. The law of Moses established the use of water to cleanse people from ceremonial defilement (Num 19:14-19). Later, Gentile converts to Judaism from pagan religions were admitted to Judaism only after fulfilling certain obligations, which included the study of the Torah, circumcision, and a ritual bath to wash away the impurities of their Gentile background. This ritual cleansing was often done in special baths created for purification, called mikvahs. Mikvahs were located at many synagogues, and the Temple in Jerusalem had a large number of mikvahs, which suggests that those who approached for worship would ritually bathe. John preached “that people should be baptized to show that they had repented of their sins and turned to God to be forgiven” (Luke 3:3). John’s baptism was an aspect of his role in preparing people’s hearts to receive the Messiah (Luke 3:4-6), and those who had received his baptism and repented of their sins were those who were prepared for Jesus’ messag...

Jesus’ Ascension Jesus’ ascension into heaven was a final commissioning service for the apostles (Acts 1:6-11; Luke 24:45-53). The ascension marks the beginning of the powerful ministry of the Holy Spirit through the church (Luke 24:49). Christ’s ascension to heaven indicates his elevation to ultimate power and authority (Eph 1:19-23; Phil 2:9-11). That Jesus was going to the Father is noted in other places (John 6:62; 13:1-3; 13:31–14:3, 14:28; 16:5-10, 16, 28; 20:17; Eph 4:8-10). It occurred at the last of Jesus’ physical appearances; after this he would remain in heaven until the “final restoration of all things” (Acts 3:21). The ascension reminds believers of Jesus’ promised return (Acts 1:11; see Matt 24:30; Mark 13:26; John 14:3). The witnesses of the ascension went back to Jerusalem with joy and exhilaration, in praise and worship of Christ (Luke 24:52). They were convinced that their Lord would return again, physically and personally (1 Thes 4:16; 2 Thes 1:7-10; 2 Pet 3:10). Jesus’ ascension anticipates the believer’s own glorious entrance into the presence of God, where Jesus has gone to prepare the way (John 14:1-3; 2 Cor 5:4; Phil 3:21; Heb 6:19-20). Passa...

The Holy Spirit’s Presence The book of Acts clearly highlights the presence and power of the Holy Spirit. Before the coming of the Spirit, Jesus spoke of the Spirit’s influence on his followers (1:8; see John 14:15-17, 26; 15:26; 16:7-15). The Spirit’s guidance was clear in the selection of Spirit-filled leaders to care for the needs of the Hellenistic widows (Acts 6:1-7) and in the appointing of Barnabas and Saul for missionary service (13:1-5). When the first church council met to consider the membership of Gentiles in the church, those present followed the Spirit’s direction (15:28). Christian workers such as Stephen and Philip were filled with the Spirit and preached by his power (6:1–8:40), and Paul’s ministry was charged with the Spirit’s energy from the beginning (9:17). In Acts, the growth, development, and expansion of the church took place entirely under the guidance and power of the Spirit (e.g., 2:4, 41-47; 4:31; 5:32; 8:15, 17, 29; 9:31). Because of the prominence of the Spirit’s work in Acts, the book has often been called “the Acts of the Holy Spirit.” The Holy Spirit works in many ways. He gives and restores life (Gen 2:7; Ps 104:24-30; Ezek 37:1-14; Joel 2:28...