There is only one God
The first step is to establish how many Gods exist: one! Isaiah 43:10; 44:6,8; 45:5,14,18,21,22; 46:9; 47:8; John 17:3; 1 Cor. 8:5-6; Gal. 4:8-9
•"I am the LORD, and there is no other; besides Me there is no God" (Isaiah 45:5).
•“Thus says the Lord, the King of Israel And his Redeemer, the Lord of hosts: ‘I am the first and I am the last, And there is no God besides Me," (Isaiah 44:6).
•"I am the Lord, and there is no other; besides Me there is no God, (Isaiah 55:5).
The Trinity
Called God;(FATHER)Phil. 1:2
(SON)John 1:1,14; Col. 2:9
(HOLY SPIRIT)Acts 5:3-4
Creator;(FATHER)Isaiah 64:8
(SON)John 1:3; Col. 1:15-17
(HOLY SPIRIT)Job 33:4, 26:13
Resurrects; (FATHER)1 Thess. 1:10
(SON)John 2:19, 10:17
(HOLY SPIRIT)Rom. 8:11
Indwells;(FATHER)2 Cor. 6:16
(SON)Col. 1:27
(HOLY SPIRIT)John 14:17
Everywhere;(FATHER)1 Kings 8:27
(SON)Matt. 28:20
(HOLY SPIRIT)Psalm 139:7-10
All knowing;(FATHER)1 John 3:20
(SON)John 16:30; 21:17
(HOLY SPIRIT)1 Cor. 2:10-11
Sanctifies;(FATHER)1 Thess. 5:23
(SON)Heb. 2:11
(HOLY SPIRIT)1 Pet. 1:2
Life giver;(FATHER)Gen. 2:7: John 5:21
(SON)John 1:3; 5:21
(HOLY SPIRIT)2 Cor. 3:6,8
Fellowship;(FATHER)1 John 1:3
(SON)1 Cor. 1:9
(HOLY SPIRIT)2 Cor. 13:14; Phil. 2:1
Eternal;(FATHER)Psalm 90:2
(SON)Micah 5:1-2
(HOLY SPIRIT)Rom. 8:11; Heb. 9:14
A Will;(FATHER) Luke 22:42
(SON)Luke 22:42
(HOLY SPIRIT)1 Cor. 12:11
Speaks;(FATHER) Matt. 3:17; Luke 9:25
(SON)Luke 5:20; 7:48
(HOLY SPIRIT)Acts 8:29; 11:12; 13:2
Love;(FATHER)John 3:16
(SON)Eph. 5:25
(HOLY SPIRIT)Rom. 15:30
Searches the heart;(FATHER)Jer. 17:10
(SON)Rev. 2:23
(HOLY SPIRIT)1 Cor. 2:10
We belong to;(FATHER)John 17:9
(SON)John 17:6
Savior;(FATHER)1 Tim. 1:1; 2:3; 4:10
(SON)2 Tim. 1:10; Titus 1:4; 3:6
We serve;(FATHER)Matt. 4:10
(SON)Col. 3:24
Believe in;(FATHER)John 14:1
(SON)John 14:1
Gives joy;(SON)John 15:11
(HOLY SPIRIT)John 14:7
Judges;(FATHER) John 8:50
(SON)John 5:21,30
. . .
Therefore, the doctrine of the Trinity is arrived at by looking at the whole of scripture, not in a single verse. It is the doctrine that there is only one God, not three, and that the one God exists in three persons: Father, the Son, and the Holy Spirit. An analogy would be time. Time is past, present, and future. But, there are not three times, only one.
There is no record of this being taught as doctrine before the second Pope, - Pope Constantine, decreed it at the Council about 300 AD.
If it was an accepted doctrine, why did they debate it for so long?
The Pope finally put an end to the debate by a decree that formalized the doctrine, and also the doctrine that the sun revolves around the earth.
Another analogy would be length, breadth, and heighth. 1 x 1 x 1 = 1, the total volume. Not 1 + 1 + 1 = 3.
Father, Son, Holy Spirit. The Spirit proceeds from the Father through the Son. The three are One God.
Nature, Person, Personality. The personality proceeds from the nature through the person. The three are one individual.
The Past proceeds from the Future through the Present. The Future is the source of the past.
From the equation, it would appear that the Father, the Future, and the Nature are invisible.
And the Son, the Person, and the Present are visible, phenomenal, and knowable.
And the Spirit, the Personality, and the Past also share a commonality. They are also invisible.
From that, I would have to deduct that Christ, the Son of God is the presence of God in the Present.