God’s own Spirit, Joel tells us, is poured out upon all of His people in the last days (Joel 2:28–29). We know that this outpouring happened on Pentecost, shortly after Jesus ascended to heaven (Acts 2:1–21), but to fully enjoy the Spirit’s presence in our lives, we must understand who He is and what He does. Over the next week, volume 5 of Dr. R. C. Sproul’s teaching series Foundations, which covers pneumatology (the doctrine of the Holy Spirit), will guide us in a study of the person and work of the Holy Spirit. You will note that in the preceding paragraph, we repeatedly referred to the Holy Spirit as “He,” not “it.” This reflects the teaching of Scripture that the Spirit is not an impersonal force or a mere attribute of God’s power, but rather a person. Many sects and cults teach otherwise, yet the use of the personal pronoun for the Holy Spirit and the fact that the Spirit possesses a will, knowledge, and affections reveals His personhood (John 16:4b–11; Eph. 4:30). We have a personal relationship with the Holy Spirit just as we have a personal relationship with the other two persons of the Holy Trinity. The best place to begin our study of the person and work of the Holy Spirit is at the beginning, for the first place we read about the Spirit is in the opening verses of the Bible. Today’s passage reveals that at the moment of creation, God the Holy Spirit hovered over the primordial waters that our Creator had made ex nihilo, that is, “out of nothing” (Gen. 1:1–2). By His power in creation, He brought forth light out of darkness and order out of disorder. Thus, one of the key works of the Holy Spirit is to bring things to life and to set things in order. He is the Spirit of order, as Paul explains, for “God is not a God of confusion but of peace” (1 Cor. 14:33). Throughout the Old Testament, we see the Holy Spirit working also in redemption. We have noted that the old covenant ministry of the Spirit to gift individuals for service was mainly limited to prophets, priests, and kings, although He regenerated all believers during the old covenant period. The Holy Spirit anointed prophets to speak God’s Word, priests to intercede for the people, and kings to lead Israel against the enemies of God (1 Sam. 16:13; 2 Chron. 24:20; 2 Peter 1:21). The Lord used all these individuals to advance His plan of redemption, pointing ultimately to Christ, whom the Spirit anointed as our Prophet, Priest, and King to secure our eternal salvation (Heb. 1:1–4; 9:14).