Jn 15:26, Acts 5:30-32
The Holy Spirit reminds us of what Jesus taught. Jesus taught that He was the Christ. (Jn 14:26)
Jn 14:26 But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
The Holy Spirit testifies that Jesus is the Christ. (Jn 15:26)
Jn 15:26 But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me:
The Holy Spirit came upon those who believed that Jesus was the Christ. (Acts 5:30-32)
Acts 5:30 The God of our fathers raised up Jesus, whom ye slew and hanged on a tree. 31 Him hath God exalted with his right hand to be a Prince and a Saviour, for to give repentance to Israel, and forgiveness of sins. 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.