God, The Holy Spirit is the Spirit of Truth. He is the revealer of Christ to the believer. Believers are directed to think of Him as a fuuly personal being. "Except a man be born of the Spirit, he cannot enter into the Kingdom of God (John 3:5-8). The Holy Spirit equips the believer for ministries into the service of God. Those who are filled with the Holy Spirit (Ghost) will have His power and love. They become partners with the Holy Spirit (Ghost) in the Kingdom of God. 

Romans 8:14-16 King James Version (KJV)

14 For as many as are led by the Spirit of God, they are the sons of God. 15 For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father. 16 The Spirit itself beareth witness with our spirit, that we are the children of God: