The Old Testament influences Luke's theology of the Holy Spirit in at least two ways. First, several Old Testament charismatic motifs-such as the transfer and sign motifs-are reflected in Luke-Acts. Second, the Septuagint, which is the Greek Bible used by Luke and the early Church, gives Luke much of his terminology for describing the activity of the Holy Spirit in New Testament times. Therefore, the study of the charismatic activity of the Spirit of God in Old Testament times is a necessary preliminary to a proper understanding of the Holy Spirit in Luke-Acts. For the purpose of demonstrating the influence of the Old Testament on Luke's theology of the Holy Spirit, I will not investigate the Old Testament use of "spirit", for in both the Hebrew and Greek Bibles it ranges in meaning from breath, wind, and attitude or emotion to Spirit of God. Rather, I will focus my investigation upon the charismatic activity of the Spirit of God. By "charismatic" I mean God's gift of his Spirit to either an individual or to a group to equip them for divine service. This gift of the Spirit of God has both experiential and functional dimensions.