It would appear that the earlier part of this thread discussed the issue of speaking in tongues as it relates to the baptism of the Holy Spirit. However, the having the Holy Spirit means much much more than just being able to speak in tongues. I'd like to try to answer the question...
What does having the Holy Spirit mean?
Well... it's the most important doctrine of Scripture. It's also perhaps the most neglected. However, behold... I show you a mystery:
1 Corinthians 6:17
But he who is joined to the Lord becomes one spirit with him.
Galatians 2:20
I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me.
With that being presented, I'll say that "Oneness" is
MORE than a "Christology". This mystery is something I'd like to expound upon if it's not understood readily. However, for additional study I'd also like to list a number of truths regarding the reality of having the baptism of the Holy Spirit:
1) New Birth (John 3:5)
2) Eternal life (John 3:15-16)
3) Salvation/release from condemnation (John 3:17-18)
4) The gift of God, eternal life (John 4:10,13)
5) Becoming a “true worshipper” (John 4:23-24)
6) Holiness (Romans 1:4)
7) Circumcision of the heart (Romans 2:29)
8) Newness of spirit (Romans 7:6)
9) Release from condemnation (Romans 8:1)
10) Life in Christ Jesus (Romans 8:2)
11) Righteousness of the Law (Romans 8:4)
12) Existence in the realm of the Spirit (Romans 8:9)
13) Ownership by Christ (Romans 8:9)
14) Life because of (imputed) righteousness (Romans 8:10)
15) Quickening of our mortal bodies at the resurrection (Romans 8:11)
16) The power to mortify the deeds of the body (Romans 8:13)
17) Leading of the Spirit (Romans 8:14)
18) Being a son of God (Romans 8:14)
19) Witness from God himself that you are his child (Romans 8:16)
20) Adoption (Romans 8:15)
21) First fruits of the Spirit (Romans 8:23)
22) Help with our weaknesses (Romans 8:26)
23) Intercession on our behalf , during prayer, according to the will of God (Romans 8:26-27)
24) Signs and wonders (Romans 15:19)
25) Indwelling presence of Christ (John 14:17-18)
26) Guidance into truth (John 16:13)
27) Revelation of things to come (John 16:13)
28) Knowledge of what to speak, without premeditation, when on trial for the gospel. (Mark 13:11)
29) Thorough cleansing (Luke 3:16-17)
30) Teaching from God (John 14:26)
31) Remembrance of Christ’s teachings (John 14:26)
32) The Breath of Life (John 20:22)
33) Power to BE witnesses (of his resurrection. Not “power TO witness”. Acts 1:8)
34) Tongues (acts 2:4)
35) Gift of eternal life (Acts 2:38)
36) Boldness to speak God’s word (Acts 4:31)
37) Witness from God that he has exalted Christ and raised him from the dead (Acts 5:31-32)
38) Witness from God that one has obeyed the gospel (Acts 5:32)
39) Wisdom (Acts 6:3)
40) Faith (Acts 12:23)
41) Joy (Acts 13:32)
42) Witness from God that one has believed the gospel ,and has been accepted by Him (Acts 15:9)
43) A heart that has been purified by faith (regenerated, recreated, made holy by God’s very presence. Acts 15:9)
44) The love of God shed abroad in our hearts (Romans 5:5)
45) Righteousness, joy, and peace (Romans 15:3)
46) Joy, peace in believing, abounding love (Romans 15:13)
47) Sanctification (Romans 15:16)
48) Teaching and wisdom concerning spiritual things (I Corinthians 2:13)
49) Being God’s temple (I Corinthians 6:19)
50) The right to call Jesus your Lord (I Corinthians 12:3)
51) Communion with God (II Corinthians 13:14)
52) Joy during affliction (I Thessalonians 1:6)
53) Salvation by washing of regeneration and renewing (Titus 3:5)
54) Signs, wonders, miracles (Hebrews 2:4)
55) Witness from God that we are perfected and sanctified by the sacrifice of Christ. (Hebrews 10:14)
56) Testimony from God that you have entered the New Covenant, with God’s laws written on your heart and with your sins forgiven. (Hebrews 10:17)
57) Demonstration of the power of the Spirit when preaching (I Corinthians 2:4)
58) Revelation of what God has prepared for in this life (the deep things of God.. I Corinthians 2:10)
59) Knowledge of the things freely given to us by God (I Corinthians 2:12)
60) Becoming God’s temple (I Corinthians 3:16, I Corinthians 6:18)61) Washing, sanctification, and justification by the authority of Christ (I Corinthians 6:11)
62) Spiritual Gifts (I Corinthians 12:4-11)
63) Baptism into the body of Christ (I Corinthians 12:13)
64) Supernatural prayer (I Corinthians 12:14-16)
65) Receiving a quickening or spiritual life (I Corinthians 15:45)
66) Seal or sign of God’s ownership over us, that we are now in his possession and indwelt by Him (2 Corinthians 1:22)
67) Declared to be the epistle of Christ, read by men (2 Corinthians 3:21)
68) Becoming a minister of the New Covenant by the life giving Spirit of God. (2 Corinthians 3:6)
69) Liberty (vs. Law..2 Corinthians 3:17)
70) Glorious ministration of the Spirit (2 Corinthians 3:8)
71) Changing to the image of Christ from glory to glory (2 Corinthians 3:18)
72) Earnest or guarantee of things to come (2 Corinthians 5:5)
73) Being a partaker of the promise God made to Abraham, becoming a child of Abraham by faith. (Galatians 3:14)
74) Sonship, being God’s child (Galatians 4:6)
75) Hope of righteousness by faith (Galatians 5:5)
76) Victory over the flesh (Galatians 5:16)
77) Freedom from the Law (Galatians 5:18)
78) Spiritual fruit (Galatians 5:22-23)
79) Everlasting life (Galatians 6:8)
80) Seal or sign of God’s ownership of us (Ephesians 1:13)
81) Wisdom and revelation in the knowledge of Him (Ephesians 1:17)
82) Access to the Father (Ephesians 2:18)
83) Becoming the habitation of God (Ephesians 2:22)
84) Strength in our inner man with God’s might (Ephesians 3:16)
85) Sealing or marking of God’s ownership (Ephesians 4:20)
86) Fruit of goodness, righteousness, and truth (Ephesians 5:9)
87) Sanctification (2 Thes. 2:13, I Peter 1:2)
88) God’s abiding presence (I John 3:24, 4:5)
I pray that this blesses someone and adds to their relationship with God.
God bless!