What is the Holy Trinity?

Christians speak of God as Father, Son and Holy Spirit — three Persons, yet not three Gods. The word "Trinity" never appears in the Bible, so the questions are simple to ask and deep to answer: where does this come from, and what does it mean for anyone reading Scripture?

One God, Three Persons

The term is a human word chosen to carry a truth Scripture teaches at length. One writer, using it as his own title, admits the label is not biblical while the substance is:

Our title at the head of this paper is one such. Yet there is abundance of teaching in the Holy Scriptures that God reveals Himself as Father, Son and Holy Spirit, not three Gods, but a Triune God, though Scripture teaches that the Father is God, the Son is God, the Holy Spirit is God, yet one God indivisible.

A J Pollock

The three names stand together in the words Jesus gave for baptism:

The Father is God, the Son is God, and the Holy Spirit is God; yet there are not three Gods, but one God, "God is one" (Gal. 3:20; 1 Tim. 2:5, N.Tr.). Baptism is to the name of the Father and of the Son and of the Holy Spirit," we are told in Matthew 28:19. This indicates for us the trinity of Persons in the Godhead, all of whom share in that supreme glory.

H J Vine

A mystery, not a puzzle to solve

Nobody claims to have this figured out. The limits are built into what we are:

The Holy Trinity—Three in One, and One in Three—is in its essence a mystery beyond human comprehension, even when the comprehension is that of the renewed mind of the believer. In the very nature of things this must be so. How can the creature comprehend the Creator; the finite, the Infinite; the relative, the Absolute.

A J Pollock

The word "Person" needs care

We borrow "Person" from ordinary speech, and ordinary speech is where the mistakes start:

In human language when we speak of a person, we think of separate entity, separate existence, separate will, different characteristics, thoughts and plans peculiar to each person, not shared with any others. Carry that human thought into the subject before us, and the truth of the Trinity is entirely perverted and lost. Instead of the Trinity—Father, Son and Spirit, ONE God—we should have three Gods, an absolute impossibility, for there can only be one God, unique and incomprehensible.

A J Pollock

Hinted early, revealed in the Son

Readers have long seen a signal in the Bible's opening line, where the word for God is plural and the verb is singular:

This is hidden in the very first verse of the Bible. "In the beginning, God [the word God, is not in the singular, not in the dual, but in the plural, which at the least must mean three, and in the light of Scripture it is undoubtedly three in this case] created [the verb is singular, thus emphasising that God is One] the heavens and the earth" (Gen. 1:1).

A J Pollock

But hints are not the full disclosure. That waited for the coming of Christ:

Now, even though it be allowed there were intimations in the Old Testament of the doctrine, yet God was not revealed in Trinity until the Son had come. Only by the presence of the Son of God on earth could the knowledge of the Father be revealed. We know the Father in and by the Son. The Father bears witness to His beloved Son, and the Son makes known the Father.

Various

Seen and heard at the Jordan

At the baptism of Jesus all three are present at once, each in a different way:

On this praying and dependent Man the Holy Ghost descended in bodily shape like a dove, while the Father's voice declared Him to be the beloved Son, the Object of all the Divine delight. Thus at last the truth of the Trinity became manifest. The Spirit became for a moment visible; the Father became audible; the Son was here in flesh and blood, and consequently not only visible and audible but tangible also.

F. B. Hole

One mind, one purpose

Because God is one, no plan belongs to one Person alone:

such is the unity of the Godhead that there cannot be one thought in the Father's mind that is not altogether shared and approved by the Son and the Spirit—not one intention or purpose in the mind of One of the Persons in the Godhead but what is fully shared and endorsed by the other Two Persons in the Godhead, for God is One.

A J Pollock

Why it touches every Christian

This is not a topic for specialists. Salvation itself involves all three:

But the Father would have sent the Son in vain, and the Son would have come and died and rose again for naught as far as men were concerned, if the Holy Ghost had not come to give an answer in the hearts of men to the grace of the Father and the Son. His work is as essential to the carrying out of the divine purpose as is that of the Father and the Son. The glorious Persons of the Trinity are one in purpose and equal in glory.

J T Mawson

So the advice to leave the subject alone is refused:

If God has revealed Himself, as is seen in the Scriptures, surely He desires that revelation to be received and prized above aught else. Our highest blessing springs from the revelation God has been pleased to make of Himself. The more we understand of these things, the more is the very foundation of Christianity laid in our souls, the formative power of such truth leading to the true worship of God as nothing else can do.

A J Pollock

Summary

- Revealed, not reasoned — the Trinity is a mystery no mind can measure; what we know comes from God showing Himself in Scripture.

- One God — Father, Son and Holy Spirit are each God, yet not three Gods but one God indivisible; baptism is into that one name.

- Careful words — "Person" here must not carry its everyday sense of separate wills and private plans, or the truth collapses into three Gods.

- Hinted, then unveiled — signals appear from the Bible's first verse, but God was made known as Father, Son and Spirit only when the Son came; the Jordan shows all three at once.

- Shared work — one mind and one purpose runs through them, and Father, Son and Spirit are each needed for a person to be saved — which is why this truth shapes worship rather than idle debate.

Reviewed by Orion on August 19, 2026