Was a helpful scriptural exploration of correct biblical sense of doctrinal truths concerning the third Co equal and Co eternal person of the Holy Trinity. The Holy Spirit. Who is also God the LORD, with the Father the Lord Almighty and with the Eternal Son, God's Word. Jesus Christ our Lord and our Saviour. This one and several other titles on the Holy Spirit - including the great one by Billy Graham - all helped me to learn proper biblical correct doctrine and beliefs to do with God's Holy Spirit, the Spirit of Christ and of truth. The Spirit belonging to God and to Christ. Jesus, our Rock of our salvation. Upon Whom our faith in God is centered and based. Who is the Christ. For He is the Way and the Truth and the only fullness of life to be found in Him. Correct knowledge of biblical doctrine in study helps prevent us falling into error non biblical beliefs. (Like the many non Trinitarian error beliefs of Oneness or Modalism.) Being in obedience to God, we are to study His Word to show ourselves approved of Him. To learn of Him correctly, according to the examining of ourselves and all we have believed to the truth of scripture. To bring us into line of obedience to the Word of God. Who is Himself Christ. God the LORD. Good study book. I enjoyed going through. I highly recommend any such of a study with God's Word.