Simply stated the Trinity doctrine is patently false. Notably, the largest flaw concerns who (or what) the Holy Spirit is. Biblically, it's defined as the "power of God" (Acts 10:38; Romans 15:19; 1 Corinthians 2:4-5; 2 Timothy 1:7), now expressed through the spiritual embodiment of Jesus Christ per (Acts 3:20; 1 Corinthians 12:12-27; 2 Corinthians 3:17; 13:5; Colossians 1:24-27; Philippians 1:19; 1 John 3:24). It is not a third personage!
The following non-exhaustive list of questions help illustrate this:
(1) Why does John 1:1-3 emphatically describe Two Divine beings; thus identifying the Members of Elohim in Genesis 1?
(2) Why did Christ say, "I and My Father are one" (John 10:30), instead of "I, My Father, and the Spirit are one"? Please also address how such a statement would be possible when inspired?
(3) Why is the Holy Spirit not considered Christ's father? (Matthew 1:18).
(4) If the Holy Spirit is a personage, then explain how there is only one Mediator between God [the Father] and Man -Jesus Christ; when there should be two? (1 Timothy 2:5).
(5) Why is the Spirit referred to as a "gift" (Acts 10:45; 1 Timothy 4:14), that God gives without limit? (John 3:34, NIV).
(6) How can you "quench" a person? (1 Thessalonians 5:19).
(7) How can a person be poured out on people? (Acts 2:17, 33; 10:45).
(8) How can we be baptized with this third person? (Matthew 3:11). Is this some kind of possession? (Acts 13:9; 1 Corinthians 3:16; 2 Timothy 1:14).
In contrast to the Father and Christ, who are consistently compared to actual beings in their form and shape, the Holy Spirit is consistently represented, by various symbols and manifestations in a completely different manner...Why?
(9) Breath? (John 20:22).
(10) Wind? (Acts 2:2).
(11) Fire? (verse 3).
(12) Water? (John 4:14; 7:37-39)?
(13) Oil? (Psalm 45:7; compare Acts 10:38; Matthew 25:1-10).
(14) A Dove? (Matthew 3:16).
(15) An "earnest" -or down payment, on eternal life? (2 Corinthians 1:22; 5:5; Ephesians 1:13-14, KJV).
(16) Why did the Spirit not express "Grace, Peace and Mercy" to the churches along with God the Father and Jesus Christ? (Romans 1:7; 1 Corinthians 1:3; 2 Corinthians 1:2; Galatians 1:3; Ephesians 1:2; Philippians 1:2; Colossians 1:2; 2 Thessalonians 1:2; 1 Timothy 1:2; 2 Timothy 1:2; Titus 1:4; Philemon 1:3; 2 John 1:3).
(17) Why was the church at Thessalonica established ONLY "in God the Father and the Lord Jesus Christ" -and NOT the third "co-equal" person? (1 Thessalonians 1:2). Whereas, we are then told that God had given His Spirit to them after all (4:8). How is such a contradictory initial oversight possible when inspired?
(18) Why are only the Father and Jesus described as "the temple" in the New Jerusalem? (Revelation 21:22). If the Holy Spirit is third coequal person -why is he excluded and how is this statement possible?
(19) If the Holy city will no longer require the sun and moon for light, why is only the Father and Jesus listed as illuminating it with light -and not the third person? (Revelation 21:23).
(20) Why does the Holy Spirit not have a throne? (Revelation 22:1).
(21) Why does John not mention fellowship with the Holy Spirit; whereas he indicates we have it with God the Father and Jesus Christ? (1 John 1:3).
(22) Why are we only to abide in the Son and the Father? (1 John 2:24).
(23) Why does John say, "He who abides in the doctrine of Christ has BOTH (two) the Father and the Son" (2 John 1:9)? How is such a statement possible when inspired?
(24) In the Hebrew language, the SAME word translated "Spirit" -is "Ruach" #7307 -which is referred to with feminine pronouns. Whereas, in the Greek language, the NT yields both masculine and neuter pronouns for the same Spirit?
(25) Why is the Holy Spirit only referred to by its title? Does it not have a name as the other TWO have? (Yeshua, YHWH, etc). Instead, it is identified as the comforter, the helper, or the advocate (John 14). So who is this parakletos? The answer is found in 1 John 2:1!
(26) Why did Jesus say, "If a man love Me, he will keep My word: and My Father will love him, and We (The Father and Jesus) will come unto him, and make Our abode with him" (John 14:23)? If the Holy Spirit were a third personage -should he not be included in such a profound statement?
(27) How would a Trinitarian respond to Paul when he said, "Yet to us there is ONE God, the Father, of whom are all things, and we unto him; and ONE Lord, Jesus Christ, through whom are all things..." (1 Corinthians 8:6 ERV)?
(28) Or Jesus who said, "And this is eternal life, that they know You the only true God, and Jesus Christ whom You have sent" (John 17:3)? Thus, we see from Christ's own mouth, that TWO divine personages are mentioned in direct tandem with obtaining eternal life!
(29) Why does Paul bestow peace, love, and faith upon the Ephesians as "from God the Father and the Lord Jesus Christ" -but not this alleged third personage of the Godhead (Ephesians 6:23)?
(30) If we are truly apart of Christ's Spiritual body which is the ekklesia (1 Corinthians 12:12; Colossians 1:24), then how would a Trinitarian reconcile Colossians 1:27 where Paul identifies that it's actually Christ who resides in us? I.E. He is the Head of the body -not a third personage!