The work of the Holy Spirit moves in two directions. It proceeds from the Father and Son towards creation and humanity and from Christians to the Father and the Son as he acts as an advocate for our needs. I do not believe that the work of the Holy Spirit is under our control. God, in each of the persons, does what it is that is his intention. It is better that we align ourselves with that intention rather than try to persuade the Holy Spirit, or any of the other two, to do what we would like happen.
The Bible is a work of the Holy Spirit. Our redemption is the work of the Holy Spirit. The Holy Spirit, I believe, also shapes human culture and history by influencing the thoughts and actions of different people, believers and nonbelievers, at various times and places to fulfill the purposes of the Father and the Son.
The Holy Spirit is active now and can be seen by faith as he works in our persons, faithful churches and our world. I believe that the present works of the Holy Spirit can be experienced by Christians though an internal assurance of his presence in our beings and recognition of his work in shaping events around us.
Pneumatology is the study of the Holy Spirit. It might also be defined, if we take on the mood of the writer of Ecclesiastes, as a chasing of the wind. However, there is much written about the Holy Spirit in Scripture to help us understand the nature and role of this third person of the Trinity. Despite all the information, we still do not seem to be given a concrete image for our minds except that of, occasionally, a dove.
The word Holy signifies that the Holy Spirit is divine. The words used in the original languages for Spirit have various meanings and always refer to something invisible. Some of these meanings are wind, life, energy or power. All of these meanings designate something outside human control or capture. In other words, the Holy Spirit goes where he will and does what he chooses as far as our wills are concerned, just as the other persons of the Trinity do. At the same time, just as the Son serves the purposes of the Father so the Holy Spirit moves to shape creation, history and people to the will of the Father and Son.
The triune God of Christianity is absolutely unique. Except for offshoots of Christianity, other religions have no god, one god, many gods or everything as god. The Trinity is one God existing in the persons of the Father, Son, and Holy Spirit.
The Bible adequately shows the truth of God in three persons and in one being. This mystery was revealed most fully in the person of Jesus and the writings of the New Testament. Jesus had authority to teach us about this because he was one of the persons. Thus, he was able to tell his disciples what they could understand about the Trinity and promised them another person, the Holy Spirit, would help them by providing further knowledge.
This knowledge of the Trinity has not given us the answer to “How can this be?” I believe it is meant to be this way so that we who believe can stand in awe and unbelievers will simply sound foolish when they claim the Trinity is a human invention. As written above, the only person once on earth who might lay claim to the invention of the reality of the Trinity was one of them.