1 The former treatise have I made, O Theophilus, of all that Jesus began both to do and teach,
2 Until the day in which he was taken up, after that he through the Holy Ghost had given commandments unto the apostles whom he had chosen...
2 And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting.
3 And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.
4 And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance...
7 And when they had set them in the midst, they asked, By what power, or by what name, have ye done this?
8 Then Peter, filled with the Holy Ghost, said unto them, Ye rulers of the people, and elders of Israel,
9 If we this day be examined of the good deed done to the impotent man, by what means he is made whole;
10 Be it known unto you all, and to all the people of Israel, that by the name of Jesus Christ of Nazareth, whom ye crucified, whom God raised from the dead, even by him doth this man stand here before you whole.
11 This is the stone which was set at nought of you builders, which is become the head of the corner.
12 Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.
13 ¶ Now when they saw the boldness of Peter and John, and perceived that they were unlearned and ignorant men, they marvelled; and they took knowledge of them, that they had been with Jesus.
31 ¶ And when they had prayed, the place was shaken where they were assembled together; and they were all filled with the Holy Ghost, and they spake the word of God with boldness.
32 And the multitude of them that believed were of one heart and of one soul: neither said any of them that bought of the things which he possessed was his own; but they had all things common.
32 And we are his witnesses of these things; and so is also the Holy Ghost, whom God hath given to them that obey him.
33 When they heard that, they were cut to the heart, and took counsel to slay them.
3 Wherefore, brethren, look ye out among you seven men of honest report, full of the Holy Ghost and wisdom, whom we may appoint over this business.
4 But we will give ourselves continually to prayer, and to the ministry of the word.
5 ¶ And the saying pleased the whole multitude: and they chose Stephen, a man full of faith and of the Holy Ghost...
Of course...I could keep on going. What I would like to point out is how deliberate and frequent the references to the Holy Ghost are throughout Acts, as the narrator, Luke, reminds us of its critical power and necessity to our conversion and the continual growth of our testimonies. That's all I wish to elaborate on at this time.