I will attempt to explain the Trinity with the following things in mind.
Eph 3:3, How that by revelation he made known unto me the mystery; (as I wrote afore in few words,
Eph 3:4, Whereby, when ye read, ye may understand my knowledge in the mystery of Christ)
Tit 2:1, But speak thou the things which become sound doctrine:
There is one Spirit (Ephesians 4:4); the Father (John 4:23-24), the Son (John 4:24, Ephesians 3:17, Colossians 1:27, 1 John 5:12), and the Holy Ghost (John 7:39, 2 Timothy 1:14).
There is one Lord (Ephesians 4:5); the Father (Matthew 11:25, Luke 10:21), the Son (1 Corinthians 8:6, 1 Corinthians 12:3), and the Holy Ghost (2 Corinthians 3:17).
There is one God (Ephesians 4:6); the Father (1 Corinthians 8:6, James 3:9 (kjv), Romans 15:6, Ephesians 4:6), the Son (Hebrews 1:8-9; John 8:58, Exodus 3:14; John 8:59, John 10:31-33), and the Holy Ghost (Acts 5:3-4, Romans 8:26-27).
With this in mind, I encourage the reader to interpret 1 Corinthians 12:4-6 and Ephesians 4:4-6.
That being said, there are distinctions between the members of the Trinity.
The Father is a Spirit (John 4:23-24) inhabiting eternity (Isaiah 57:15) without flesh.
The Son is the same Spirit (Ephesians 4:4, John 4:24) dwelling in human flesh (1 John 4:1-3, 2 john 1:7).
The Holy Ghost is the same Spirit (Ephesians 4:4, John 7:39); after having lived a human life in the Person of the Son (see Luke 23:46); released to the Father in eternity from the human body of the Son; and who also descends into time in order to produce holy scripture (1 Peter 1:11) and to work within the church in order to win souls to Jesus Christ.
The Father, in the descending into time to take on an added nature of human flesh, did not VACATE ETERNITY.
So, when Jesus releases His Spirit (see John 14:7-11) back into eternity, there is now one God existing beside Himself in eternity; as there are two distinct Persons in the Father and the Holy Ghost who are infinite in nature.
The Son also being infinite in nature in His Deity; however in His humanity, which has received a glorified human body likened unto the angels (Matthew 22:30), He is of a finite nature and as He said, "The Father is greater than I" (John 14:28); while as concerning His Deity He is equal to the Father (John 5:18).
For I contend that the Son is the Son in the reality that there is a hypostatic union of the two natures of humanity and Deity.
I also contend that the Son was begotten in the incarnation (Luke 1:35); but that He ascended to fill all things (Ephesians 4:10) in the Person of the Holy Ghost.