Acts 1: 8
But you shall receive power when the Holy Spirit has come upon you.
We know something about God, and we know Jesus but who, really, is the Holy Spirit? The answer is that He is the power of God, the creative force of God. In the first chapter of Genesis we see that the earth was formless but the Holy Spirit was moving (or hovering) over the surface of the waters. Then God spoke the word and the Holy Spirit responded to that spoken word and created all that God spoke. So, by the Holy Spirit God created the earth.
Then we see in Luke 1: 35 that it was the Power of God through the Holy Spirit that caused Mary to conceive. There is the creative power of God at work. All three persons of the trinity have their place. They each have their own roles and characteristics. We are beginning to learn who the Holy Spirit is. When we do, we will be able to work with Him more effectively.
He is the one who is in the earth right now and who was promised to remain with us forever. He was sent to be our helper, guide and teacher so the more we can understand his role in our lives, the more we can learn and the more we can be led by Him. It is by His power, the power of the Holy Spirit, that we are able to positively affect our lives and the lives of others.
And the earth was formless and void, and darkness was over the surface of the deep; and the Spirit of God was moving (hovering) over the surface of the waters. Genesis 1: 2
And the angel answered and said to her, “The Holy Spirit will come upon you, and the power of the Most High will overshadow you.” Luke 1: 35
And Jesus returned to Galilee in the power of the Spirit. Luke 4: 14
And it came about one day that He was teaching; and there were some Pharisees and teachers of the law sitting there, who had come from every village of Galilee and Judea and from Jerusalem; and the power of the Lord was present for Him to perform healing. Luke 5: 17
And you know of Jesus of Nazareth, how God anointed Him with the Holy Spirit and with power. Acts 10: 38
Now may the God of hope fill you with all joy and peace in believing, that you may abound in hope by the power of the Holy Spirit. Romans 15: 13
“…in the power of signs and wonders, in the power of the Spirit…” Romans 15: 19
And my message and my preaching were not in persuasive words of wisdom, but in demonstration of the Spirit and of power. 1 Corinthians 2: 4
[T]o be strengthened with power through His Spirit. Ephesians 3: 16
[F]or our gospel did not come to you in word only, but also in power and in the Holy Spirit. 1 Thessalonians 1: 5