God is a Spirit. He is the Spirit of truth. He is our Father. His name is Jesus.

The Father created a sinless human body for Himself so that He could pay the price of death for our sins and reconcile us back to Him. (2Cor.5:19, 21)

Jesus revealed to His chosen disciples that He was the Father in a human body. They knew Him as a man that had flesh and blood like themselves, grew tired and hungry, and prayed. They also knew Him as the Mighty God that caused the winds to cease, multiplied the fish and the loaves, raised the dead, healed the sick, forgave sins, cast out devils, and answered prayers. (John 14:7-11)

Jesus told His disciples it was necessary for Him to suffer, be killed, and be raised again the third day. The Father’s only begotten flesh would die. By His death, He would make peace between Himself and man so that man could once again be filled with His Spirit. (Matt.16:21, Isaiah 9:6-7, Col.1:19-23)

He had dwelt with them; soon He would dwell in them. (2Cor.6:16, 1Cor.6:19-20)

"And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever; even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you. I will not leave you comfortless: I will come to you." - John 14:16-18

After Jesus ascended in bodily form up to heaven, Apostle Peter on the Day of Pentecost preached the gospel message of Jesus’ death, burial, and resurrection. When the people heard this, they were pricked in their hearts and asked what they should do.

"Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost." - Acts 2:38

The Spirit of truth had been with them, Jesus Christ, the Father revealed in flesh. Now the Spirit of truth would be in them!

"For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call." - Acts 2:39