What did the Holy Spirit do for the apostles? He guided the twelve disciples to all Truth (John 16:13). The Spirit of God gave the first century Christians the necessary revelation for learning about God's moral character and His general will for us (John 14:16; 26). He is a source spiritual nourishment and comfort.
Today, He continues to fulfill the same tasks that He was originally appointed for. The Holy Spirit works by helping true members of the church persevere daily through all sorts of sinful temptations and persecutions. He leads searching people to truth. The Spirit combats evil through the spread of the Gospel message, which is His fighting gear (Ephesians 6:10-18; Hebrews 4:12).
The Lord Jesus Christ is eternally present in His divinity along with the Holy Spirit. Both members of the Holy Trinity intercede on our behalf in prayer. They express our needs that we cannot even begin to utter. The Father and Son come to and dwell with believers in the Holy Spirit. Christ ascended into heaven to pour out the Spirit on the body of the redeemed.